Hi guys, thanks for taking the time to read and respond
I got a Verizon sm-g930v Galaxy s7 and my service is through T-Mobile.
I currently have Verizons very recent nougat 7 release with security patch of February 1, 2017 and baseband G930VVRU4BQA2.
I have 2 issues which might be related and I'm trying to figure out what's the best way to do it and if it is at all possible.
1) my lte speed is crap and service inside buildings is awful. I read that there are ways to unlock the bootloader but couldn't find how to do it on my phone.
2) no ussd codes work even after factory reset, every single ussd code I put (even the one to view imei) says ussd running and then says connection problem or invalid mmi.
Is it possible to flash T-Mobile nougat firmware on my phone? Will it unlock the bootloader to allow me to unlock all lte bands?
Is there another better way to solve the above issues?
Thanks for your help!
Tnewbie said:
Hi guys, thanks for taking the time to read and respond
I got a Verizon sm-g930v Galaxy s7 and my service is through T-Mobile.
I currently have Verizons very recent nougat 7 release with security patch of February 1, 2017 and baseband G930VVRU4BQA2.
I have 2 issues which might be related and I'm trying to figure out what's the best way to do it and if it is at all possible.
1) my lte speed is crap and service inside buildings is awful. I read that there are ways to unlock the bootloader but couldn't find how to do it on my phone.
2) no ussd codes work even after factory reset, every single ussd code I put (even the one to view imei) says ussd running and then says connection problem or invalid mmi.
Is it possible to flash T-Mobile nougat firmware on my phone? Will it unlock the bootloader to allow me to unlock all lte bands?
Is there another better way to solve the above issues?
Thanks for your help!
Click to expand...
Click to collapse
hi, not bootloader unlock yet for the g930v, you can dowload and flash the g930t firmware G930TUVU4BQB1.
Thank you
albertordzcz said:
hi, not bootloader unlock yet for the g930v, you can dowload and flash the g930t firmware G930TUVU4BQB1.
Click to expand...
Click to collapse
Is there a guide for this method? And will it solve the problem?
Tnewbie said:
Is there a guide for this method? And will it solve the problem?
Click to expand...
Click to collapse
1. find/download the firmware you want to install on your phone (can find at updato.com)
2. extract the files from the firmware file to a folder
3. download/install Samsung Smart Switch
4. backup your phone settings with Samsung Smart Switch (if you have a memory card, maybe be good to remove that and back it up on PC, probably faster this way than thru Samsung Smart Switch)
5. install the latest version of Odin on your PC, open it
6. select BL/AP/CP/CSC buttons then select the matching file (BL for BL_xyz file, etc) - if you use the HOME_CSC file you will NOT have any tmobile specific features (Wifi Calling) enabled/appear, you must use the regular CSC file to add/enable these features
7. in Odin, select OPTIONS and make sure that only "Auto Reboot" and "F. Reset Time" are checked
8. put the galaxy s7 phone in download mode (turn off....while off press VolumeDown+Home+Power until a blue screen appears, press VolumeUp button to enter download mode)
9. connect the galaxy s7 phone to the PC (you should see a blue icon appear under ID:COM afterward)
10. hit START in Odin to begin the process
11. when the process is complete (PASS appears in Odin status window) the galaxy s7 will reboot and begin to install the update
ISSUE - if the phone boots to recovery mode, dm-verity verification failed....DO NOT PANIC....simply put the phone back in download mode, connect it to the PC, and in Odin ONLY select the AP file....install only that file and let the device restart, it should boot to the user menu)
NOTES - while the device is booting to the user menu, it may sit at the Tmobile splash screen an extended amount of time the initial time - please let it sit for a few minutes, and it will boot to the user menu (subsequent restarts don't have a long delay at Tmobile screen)
12. after it boots to the user menu, connect the galaxy s7 to the PC, and restore the phone using Samsung Smart Switch
albertordzcz said:
1. find/download the firmware you want to install on your phone (can find at updato.com)
2. extract the files from the firmware file to a folder
3. download/install Samsung Smart Switch
4. backup your phone settings with Samsung Smart Switch (if you have a memory card, maybe be good to remove that and back it up on PC, probably faster this way than thru Samsung Smart Switch)
5. install the latest version of Odin on your PC, open it
6. select BL/AP/CP/CSC buttons then select the matching file (BL for BL_xyz file, etc) - if you use the HOME_CSC file you will NOT have any tmobile specific features (Wifi Calling) enabled/appear, you must use the regular CSC file to add/enable these features
7. in Odin, select OPTIONS and make sure that only "Auto Reboot" and "F. Reset Time" are checked
8. put the galaxy s7 phone in download mode (turn off....while off press VolumeDown+Home+Power until a blue screen appears, press VolumeUp button to enter download mode)
9. connect the galaxy s7 phone to the PC (you should see a blue icon appear under ID:COM afterward)
10. hit START in Odin to begin the process
11. when the process is complete (PASS appears in Odin status window) the galaxy s7 will reboot and begin to install the update
ISSUE - if the phone boots to recovery mode, dm-verity verification failed....DO NOT PANIC....simply put the phone back in download mode, connect it to the PC, and in Odin ONLY select the AP file....install only that file and let the device restart, it should boot to the user menu)
NOTES - while the device is booting to the user menu, it may sit at the Tmobile splash screen an extended amount of time the initial time - please let it sit for a few minutes, and it will boot to the user menu (subsequent restarts don't have a long delay at Tmobile screen)
12. after it boots to the user menu, connect the galaxy s7 to the PC, and restore the phone using Samsung Smart Switch
Click to expand...
Click to collapse
Thank you so much for taking the time to write all this!! Will it let me go on T-Mobile lte bands after or that won't be possible until there is a bootloader unlock for the device?
Tnewbie said:
Thank you so much for taking the time to write all this!! Will it let me go on T-Mobile lte bands after or that won't be possible until there is a bootloader unlock for the device?
Click to expand...
Click to collapse
Well... no bootloader unlock to free lte bands, and give a try on this rom to find if you can use your lte bands
There is a thread here related to your issue
Take a look at this thread and you may find your answers.
https://forum.xda-developers.com/verizon-galaxy-s7/how-to/official-t-mobile-nougat-rom-verizon-t3562509
Thank you, I finally got to doing it. It was easy and I now have T-mobile OS on the phone, all Verizon stuff is gone and USSD codes now working. It seems like I was able to select all LTE bands, speed is a bit better indoors but not amazing.
Is there a reason to fully root the phone? and can someone explain what benefits would I have from rooting at this point?
Tnewbie said:
Thank you, I finally got to doing it. It was easy and I now have T-mobile OS on the phone, all Verizon stuff is gone and USSD codes now working. It seems like I was able to select all LTE bands, speed is a bit better indoors but not amazing.
Is there a reason to fully root the phone? and can someone explain what benefits would I have from rooting at this point?
Click to expand...
Click to collapse
Rooting gives you full control over the phone. Think Windows "Administrator" account.
Some things that a rooted phone can do is fully disable and uninstall stock & carrier Bloatware, install true ad blocking services, firewall control.
But, with that kind of power, it's way easier to brick your phone, or kill the performance of the device if you start changing things that shouldn't be changed.
Thank you
joe.skelly said:
Rooting gives you full control over the phone. Think Windows "Administrator" account.
Some things that a rooted phone can do is fully disable and uninstall stock & carrier Bloatware, install true ad blocking services, firewall control.
But, with that kind of power, it's way easier to brick your phone, or kill the performance of the device if you start changing things that shouldn't be changed.
Click to expand...
Click to collapse
In that case I'll stick with flashing for now since it def solved my imminent issues.
T-Mobile firmware on Verizon sm-g930v
albertordzcz said:
Well... no bootloader unlock to free lte bands, and give a try on this rom to find if you can use your lte bands
Click to expand...
Click to collapse
This is an old thread, so I am hoping on some newer information. I have been using a Verizon Galaxy S7 on T-Mobil for about a year. This past week we were in the Lake Michigan area and I found that my wife's A21 got much better reception in several areas. I have been reading here about the g930U firmware as well as the ability to flash to the current T-Mobile ROM.
I do not need to revert back to Verizon, but I need wifi calling and all the bands that are available from T-Mobile. Can just flashing to the T-Mobile for Android 8 work for me?
Dan
dlbeaty said:
This is an old thread, so I am hoping on some newer information. I have been using a Verizon Galaxy S7 on T-Mobil for about a year. This past week we were in the Lake Michigan area and I found that my wife's A21 got much better reception in several areas. I have been reading here about the g930U firmware as well as the ability to flash to the current T-Mobile ROM.
I do not need to revert back to Verizon, but I need wifi calling and all the bands that are available from T-Mobile. Can just flashing to the T-Mobile for Android 8 work for me?
Dan
Click to expand...
Click to collapse
Just flashed to the most recent t-mobile firmware on my Verizon phone successfully. Thanks to information on this thread!
@dlbeaty what did you use to flash to most recent t-mobile firmware? I have G930V Oreo I am trying to use on T-Mobile and having same issues. Would like to try to flash to resolve as well. Thanks!
Related
Anyone out there willing to help guide me through the process of getting the retail mode removed form a samsung galaxy s5? Of course Im willing to compensate you for your time if we can get it to work.
Ive got no experience with Rom's and or installing a rom and the basic passwords have not worked on getting the software removed. Any help would be appreciated.
PhoneDoctor1
Which S5 model have you got?
Make a free account on sammobile dot com (Links are not allowed here)
Type your model S5 into the firmware section and download a ROM
Grab ODIN 3.09 or later (Easy to find with a quick google)
Extract the ROM from the zip, should end up with .MD5 file
Install Samsung drivers (Easy to find with a quick google or Installing KIES3 will also install them)
Put phone into download mode (Power off, then hold Vol down & Home & power, release when the warning appears and hit volume up when asked)
Connect phone to PC USB and wait for drivers to complete installing
Load .MD5 ROM into AP or PDA section of ODIN
Make sure only 'F.Reset Time' and 'Auto Reboot' options are selected in ODIN
Hit START on ODIN and wait for it to complete
All being well, your phone should reboot into the ROM, take a while for first boot, especially if you flash a Lollipop ROM (give it 15 mins+)
Some people find it hangs on first boot, and need to boot into recovery mode and factory reset after flashing the ROM
Same results.
*Detection* Thank you so much for your prompt response and help with this. Unfortunately the steps you provided didn't work for me. I was able to Get Odin, download the correct ROM, drivers, and everything. I installed the ROM on the phone (Took 4 minutes) though ODIN and it stated that it succeeded. Phone restarted and retail mode was back on the phone.
Any other options to get it removed?
PhoneDoctor1
Some instructions here on how to disable retail mode
http://www.naldotech.com/how-to-disable-exit-galaxy-s5-demo-live-unit-retail-mode/
How to delete, disable and exit Demo Live Unit Retail Mode on the Samsung Galaxy S5
1. The first thing to do is to disable the retail mode of the firmware.
2. Go to the app drawer and open an app called Samsung Retail.
3. Go to Configuration Settings and enter the password 5444 to unlock it.
4. Then uncheck “Disable the factory reset” and enter the following password M729Q16K8546.
5. Turn your Samsung Galaxy S5 off and boot into Recovery.
6. Go to Wipe data & factory reset and press OK.
7. The phone will reset and all the applications will get removed.
8. Flash a stock firmware with ODIN (tutorial).
There must be something different about this retail mode. It looks different than the others shown in previous posts or youtube videos. I can't seem to disable the app and the passwords don't work. Ive seen a few youtube videos on how to remove it and the one I see doesn't look like the one thats on this galaxy s5. Any other workaround to your knowledge?
PhoneDoctor1
Not that I know of off hand, I`ll post back here if I find anything, it might be quicker to take it to a phone shop and ask them to disable it for you
PhoneDoctor1 said:
There must be something different about this retail mode. It looks different than the others shown in previous posts or youtube videos. I can't seem to disable the app and the passwords don't work. Ive seen a few youtube videos on how to remove it and the one I see doesn't look like the one thats on this galaxy s5. Any other workaround to your knowledge?
PhoneDoctor1
Click to expand...
Click to collapse
Which version S5 have you got?
Just noticed this thread for the G900X to disable Retail Mode
http://forum.xda-developers.com/showthread.php?t=2733083
Ive got the t-mobil version here in the states. I did see that thread before I posted mine but that wont enable me to make calls. It will most likely turn the phone into a wifi capable phone without cell service.
Sorry, I meant which model S5, mine is the G900F
I take it you bought the phone second hand? Unless someone else can help I think taking it in for repair would be the best bet if those tutorials are not working
I would like to know how you got into retail mode!
And, of course, your model. Its in the system informations.
I had a similar issue with a laptop once (purchased the display model).....
The only thing that fixed it was formatting the hard drive and re installing everything from the recovery discs......
I guess the equivalent for Android would be to flash a PIT file (I think this will reformat the memory) then the firmware (both) with odin........
If you DO go this route, be EXTREMELY careful to flash the CORRECT pit file as flashing the wrong pit will irrevocably brick your phone.........
Sent from my rooted kn0x0 stocKK SM-G900F S5
I appreciate the help and responses. From my understanding the retail mode can not be removed. It seems that Samsung specially designed these phones with software that can't just easily be flashed.
Successfully removed Retail Mode from AT&T Samsung Galaxy S5 SM-G900A
PhoneDoctor1 said:
I appreciate the help and responses. From my understanding the retail mode can not be removed. It seems that Samsung specially designed these phones with software that can't just easily be flashed.
Click to expand...
Click to collapse
I had just about given up on a straightforward fix, and was about to resort to some major firmware manipulation that would have likely led me to all sorts of confusion. It turns out the password was "rethink" as is listed in multiple places across the web. (AT&T SM-G900A Galaxy S 5) It is applied to the Samsung Retail Mode app which has a "burger" icon in top right corner of the screen that must be selected first to lead towards password entry. This is not the "Retail Experience" app, but the other similar one. Once the Retail Mode app is uninstalled, there are intuitive steps leading to uninstalling of the "Retail Experience" one next, with no new passwords.
Hello everyone, i'm new to XDA forums and hopefully i'll find a solution to my problem here.
I am always stuck on EDGE (E) when it comes to mobile network usage, regardless of where i am. I've tried using my SIM card in another phone and it instantly goes to HSPA+ (H+).
My phone is pretty much new and i didnt mess much with it as i dont know enough about phones to play with them in that way, it has been like this ever since i took it. There is one thing that i think its most likely causing it and that is that my phone was rooted when i bought it. >>> I dont know anything about advantages/disadvantages of rooted phone and if this may or may not cause any problems but i've never had this kind of an issue before with any phone and none of my phones before were rooted. <<<
I wanted to try and unroot the device by using Mobile ODIN Pro from Google Play Store but i stopped before i even started as the PRO version that is needed for this to be done says my device is not supported and therefore i cannot buy it. I had the Lite version and there are like 4-5 features that require PRO version in order for them to be used.
I have a GT-I9505 running on 4.4.2 android version, i'm from Serbia with mts as provider for what it matters.
P.S. My network mode is set to WCDMA/GSM (auto connect), if i change it to WCDMA only i lose network completely and if i put GSM only its again back on EDGE.
Any help will be greatly appreciated.
Let's make sure you actually have an I9505. Try to enter download mode (shut the S4 off, then hold volume down, home, and power). The model at the top of the screen with the green Android on it is the actual model of your S4.
Strephon Alkhalikoi said:
Let's make sure you actually have an I9505. Try to enter download mode (shut the S4 off, then hold volume down, home, and power). The model at the top of the screen with the green Android on it is the actual model of your S4.
Click to expand...
Click to collapse
It is I9505 as i said. How do i leave this mode now? It says "Downloading... Do not turn off target !!" across the screen. :v
I strongly suggest you check that attitude of yours. Just because you said it doesn't mean it actually is. There have been too many instances of counterfeit phones as well as phones from another carrier being installed with I9505 ROMs and IMEI numbers and sold to the unsuspecting. The question is thus a valid one.
If you're looking to exit download mode, simply pull the battery. If you're looking to reinstall a stock ROM, then you're on the right screen. Simply connect your S4 to your computer and use the desktop version of Odin to flash the stock ROM. Now, how do you know which stock ROM you should be using? Simply tell us your carrier.
Strephon Alkhalikoi said:
I strongly suggest you check that attitude of yours. Just because you said it doesn't mean it actually is. There have been too many instances of counterfeit phones as well as phones from another carrier being installed with I9505 ROMs and IMEI numbers and sold to the unsuspecting. The question is thus a valid one.
If you're looking to exit download mode, simply pull the battery. If you're looking to reinstall a stock ROM, then you're on the right screen. Simply connect your S4 to your computer and use the desktop version of Odin to flash the stock ROM. Now, how do you know which stock ROM you should be using? Simply tell us your carrier.
Click to expand...
Click to collapse
There is no attitude mate, i just told you that it is what i earlier wrote after checking it the way you told me to. Nothing more than that.
By carrier you mean my mobile provider or whatever its called? If so, Telekom Srbija (mts).
The latest ROM for your device is here. The page gives instructions on how to use the file as well as download links.
Few questions:
Will that install lollipop? If yes, is lollipop worth getting? I recently heard opposite while i was actually trying to get it. It's the only opinion that i can sort of take in count so idk if its true or not.
Will it fix the problem?
"Add the firmware file to AP / PDA"
- What is(are) AP / PDA?
"Make sure re-partition is NOT ticked"
- This is an option in Odin i suppose, if it is disregard it. If not please explain.
Edit: I've downloaded PC version of Odin and i only see AP among other boxes for files to be added. Is PDA another name for it or..?
Should i also check the little box next to where it says AP? (picture below)
There's another zip file in odin folder "S1PlugIn.bundle_141117", i suppose i shouldnt touch this as you havent mentioned it?
P.S. Sorry if my questions appear stupid but i'm facing all of this for the first time and i'm just being extra careful as i dont want to mess up something.
This is the latest ROM for your device, so it will install Android 5.0.1. I believe it to be worthwhile, but if you want Android 4.4.2 instead a download is also available for it at the same site. Will it fix the problem? It should. If it doesn't then a hardware problem is more likely.
AP and PDA are two different names for the same thing. Older versions of Odin used PDA. Checking the box next to it won't hurt, and that other file isn't something you touch.
So i need to turn off my phone, go to download mode, connect pc and phone with USB, wait for some "blue sign" from ODIN and then add the file and run Start? Re-partition is disabled by default.
Everything went smooth but the problem persists... I even changed the network mode to the new options that i got (which includes 4g if i'm not wrong).
What to do?
P.S. 5.0.1 runs really slow for me, takes double more RAM than 4.4.2 and it almost filled up my whole phone memory
Try a different sim in your phone. if you still don't get 4g then you probably have a hardware failure.
Lennyz1988 said:
Try a different sim in your phone. if you still don't get 4g then you probably have a hardware failure.
Click to expand...
Click to collapse
Aye... Still the same even with another sim card. I guess its hardware problem in the end. Any idea what would it cost to fix, if you know what the problem could be at all?
Hi,
I have a Verizon S7 and I want to permanently use it in Europe, France specifically.
I put a French SIM in and can place calls, but internet did not initially work, however, I did not try to change APN settings.
My question is, is there a specific firmware I can download that will put the latest updates on there and allow future updating on a non-Verizon network? If so, which firmware would that be? I'd prefer to have all Verizon stuff removed, too.
Finally, by default, French is not in language support, but I'd like to add that, if possible.
You can flash firmware from G930U model that is unlocked version for US
Thanks. Do I need to set boot pin or anything? I saw some threads saying you have to set boot pass or pin before you flash.
Also, will there be a way to do system updates? I mean, like updating to nougat?
Hello,
i'm in the same situation than you.
Please, can anyone provideme a link to the exact rom to flash in this moment (i found broken links and obsolete roms)
If I understand correctly this is that I need to do:
1-install samsung drivers and Odin 3.12
2-Flash rom g930u(need your help to provide me) without modifying any odin settings
3-Enjoy
this is ok?
Many thanks
H0wdy said:
Hi,
I have a Verizon S7 and I want to permanently use it in Europe, France specifically.
I put a French SIM in and can place calls, but internet did not initially work, however, I did not try to change APN settings.
My question is, is there a specific firmware I can download that will put the latest updates on there and allow future updating on a non-Verizon network? If so, which firmware would that be? I'd prefer to have all Verizon stuff removed, too.
Finally, by default, French is not in language support, but I'd like to add that, if possible.
Click to expand...
Click to collapse
hey @H0wdy, i know this is a month late but here goes:
This is what I would do if you were you
-download and extract the zip I attached on a link at the bottom, extract it, and open up Samfirm program,plug in your phone in download mode i believe please double check the original linked thread (hold volume down + home + power for 7 seconds ) put in your phone model SM-G930V and put XAA as region
-next it will search for the latest international update for your phone and click download, (make sure auto decrypt is on) this take a little while to download and then decrypt, but you should end up with a zip file on your desktop containing G930U files (which i happened to upload for you anyhow, but if case you dont want to download the uiversal rom, i uploaded one for you if you wish to use that. If you wanted to do it the safe way instead of using my older Uinversal firmware, I would follow above instructions.
Next open Odin, click BL find the appropriate BL file, click CSC find that file and select, as well as the other two with AP being last make sure to use OYM CSC not HOME.
- then simply boot phone into download mode: hold Power volume- and home upon restart and it should get you into bootloader. click UP, and if your phone is recognized by your computer go ahead and flash your new universal rom.
It has NO verizon bloat and more features such as Wifi calling and Video chat phone calls!
anyway if you need more help refer to this link here if you need help with this software. I found it incredibly straight forward.
you will be able to choose French upon setup of your phone.
https://forum.xda-developers.com/ve...o/using-samfirm-to-download-sm-g930u-t3449475
let me know if this works.
Best, Silkmeister1
Files:
https://ufile.io/gvbq5
Please can you confirm if it is the correct rom?
http://updato.com/firmware-archive-select-model?record=2038D7644C6011E7963AFA163EE8F90B
Country / RegionUSA
PDAG930UUEU4BQE2
Product CodeXAA
CSCG930UOYM4BQE2
PhoneG930UUEU4BQE2
fras-xda said:
Please can you confirm if it is the correct rom?
http://updato.com/firmware-archive-select-model?record=2038D7644C6011E7963AFA163EE8F90B
Country / RegionUSA
PDAG930UUEU4BQE2
Product CodeXAA
CSCG930UOYM4BQE2
PhoneG930UUEU4BQE2
Click to expand...
Click to collapse
yes should be fine
Hi
I got my wife a Samsung S8, SIM free as it was cheaper to buy the phone out right and get a 3 SIM only deal.
Only problem is because we got the phone from a online retailer, 3 won't activate the wifi calling.
So I have decided to flash the 3 S8 firmware via odin to my wife's phone but before I do that I have a few questions so I know I don't mess things up.
I will list the questions in number form so could you list the answers in number form with answer matching the question number, so I know what people are talking about.
1. When I glanced at Sammobile, I saw nothing mentioned about 3. Only thing I saw was H3G does this mean 3....if not what is 3 software listed as.
2. Will flashing this firmware wipe or factory reset her phone. (I know that I need to back things up anyway)
3. Will doing this Firmware flash void her insurance. As it's official Samsung software, I didn't think so but I want to be sure.
4. After the update will her phone be locked to 3.
5. Has anyone got any tips and guides which can help with this.
6. I hear that you can google blocked doing this type of thing, how do you get around getting blocked and if I do, how do I unblock a google blocked phones.
7. Will flashing 3 firmware actually give me wifi calling in the end.
8. After I have installed the firmware....will I receive future android/ Samsung updates. E.g. android 7 to android 8 updates, security patches and bug fixes
Thanks guys I will leave those questions for now....if I have anymore I will add them on another comment.
Hope you can help me I have attached some stuff I saw on the net incase it helps in anyway
Owenboy89 said:
Hi
I got my wife a Samsung S8, SIM free as it was cheaper to buy the phone out right and get a 3 SIM only deal.
Only problem is because we got the phone from a online retailer, 3 won't activate the wifi calling.
So I have decided to flash the 3 S8 firmware via odin to my wife's phone but before I do that I have a few questions so I know I don't mess things up.
I will list the questions in number form so could you list the answers in number form with answer matching the question number, so I know what people are talking about.
1. When I glanced at Sammobile, I saw nothing mentioned about 3. Only thing I saw was H3G does this mean 3....if not what is 3 software listed as.
2. Will flashing this firmware wipe or factory reset her phone. (I know that I need to back things up anyway)
3. Will doing this Firmware flash void her insurance. As it's official Samsung software, I didn't think so but I want to be sure.
4. After the update will her phone be locked to 3.
5. Has anyone got any tips and guides which can help with this.
6. I hear that you can google blocked doing this type of thing, how do you get around getting blocked and if I do, how do I unblock a google blocked phones.
7. Will flashing 3 firmware actually give me wifi calling in the end.
8. After I have installed the firmware....will I receive future android/ Samsung updates. E.g. android 7 to android 8 updates, security patches and bug fixes
Thanks guys I will leave those questions for now....if I have anymore I will add them on another comment.
Hope you can help me I have attached some stuff I saw on the net incase it helps in anyway
Click to expand...
Click to collapse
Firstly, there are Dozens and dozens of flash guides all over the web on flashing a SS phones with ODIN, 2nd'ly, its one of the easiest phones to flash..
Before you do anything download and install the latest SS USB drivers.. plug your phone in so they are detected.. then goto>settings and turn ON USB debugging in developer options.. plug in phone again.. so the device is detected again, then unplug... this installs the (A)ndroid (D) ebug (B)ridge driver, leave USB Debugging ON..
Your questions:,,
1) Yes H3G is 3UK... also EE use wifi calling..
2) Yes, it will wipe her phone... When you download your H3G firmware.. there are 2 CSC files in the folder.. I recommend using CSC... do not use HOME_CSC
3) No it will not void the warranty... its only when you trip KNOX by rooting, or custom roms that you invalidate warranty... Stock is fine
4) Yes it will... you will have to get an Unlock code to SIM unlock her phone.. SIM Unlock.. is not Flashing a rom.. What makes SS devices so cool.. is that you can flash any stock rom from any provider.. and it doesnt affect the bootloader, so you could flash an unbranded (open), EE or O2 rom on your 3 SIM locked phone..
5) Theres so many on the web and on XDA for SS phones and ODIN flashing, just type "Galaxy S8 back to stock" into search. My advice.. READ READ and more READ the guides ALL THE WAY Through, before you do ANYTHING AT ALL.. and make sure the phone you have has no SIM locks or security locks on it before you start.
6) Never heard of this... its only a stock rom your flashing, youll be fine
7) If 3 support Wifi Calling and the Rom your flashing has it coded in, then Yes it should work fine. EE also support Wifi calling
8) Yes... its a STOCK Rom with a STock recovery and STOCK Knox... so you will recieve updates according to when they are rolled out by that prvider... So, if its a 3 Rom, youll get updates when 3 push them out... if its an O2 rom, youll get them from O2.. and so on.... That is why soo many people flash Unbranded/Unlocked Open Roms... because unlocked phones have, in the past, gotten updates first and factory unlocked phones / roms dont come with Bloatware / carrier rubbish apps installed ..
Remember.. Just READ everything
Hope this helps
NightOrchid said:
Firstly, there are Dozens and dozens of flash guides all over the web on flashing a SS phones with ODIN, 2nd'ly, its one of the easiest phones to flash..
Before you do anything download and install the latest SS USB drivers.. plug your phone in so they are detected.. then goto>settings and turn ON USB debugging in developer options.. plug in phone again.. so the device is detected again, then unplug... this installs the (A)ndroid (D) ebug (B)ridge driver, leave USB Debugging ON..
Your questions:,,
1) Yes H3G is 3UK... also EE use wifi calling..
2) Yes, it will wipe her phone... When you download your H3G firmware.. there are 2 CSC files in the folder.. I recommend using CSC... do not use HOME_CSC
3) No it will not void the warranty... its only when you trip KNOX by rooting, or custom roms that you invalidate warranty... Stock is fine
4) Yes it will... you will have to get an Unlock code to SIM unlock her phone.. SIM Unlock.. is not Flashing a rom.. What makes SS devices so cool.. is that you can flash any stock rom from any provider.. and it doesnt affect the bootloader, so you could flash an unbranded (open), EE or O2 rom on your 3 SIM locked phone..
5) Theres so many on the web and on XDA for SS phones and ODIN flashing, just type "Galaxy S8 back to stock" into search. My advice.. READ READ and more READ the guides ALL THE WAY Through, before you do ANYTHING AT ALL.. and make sure the phone you have has no SIM locks or security locks on it before you start.
6) Never heard of this... its only a stock rom your flashing, youll be fine
7) If 3 support Wifi Calling and the Rom your flashing has it coded in, then Yes it should work fine. EE also support Wifi calling
8) Yes... its a STOCK Rom with a STock recovery and STOCK Knox... so you will recieve updates according to when they are rolled out by that prvider... So, if its a 3 Rom, youll get updates when 3 push them out... if its an O2 rom, youll get them from O2.. and so on.... That is why soo many people flash Unbranded/Unlocked Open Roms... because unlocked phones have, in the past, gotten updates first and factory unlocked phones / roms dont come with Bloatware / carrier rubbish apps installed ..
Remember.. Just READ everything
Hope this helps
Click to expand...
Click to collapse
Thank you so much. I will make sure to do my research. I have used odin before so I have some experience using the tool but not for big things like this. Last thing I used it for was to download TWRP to my rooted tablet.
I will also pull out her memory card so she can save her photo......she will be pissed about the wiping the phone part but if we want wifi calling then needs are a must.
Anyway of backing up her phone on a level where I can just put in her user name and password it will literally restore back to the point of the last back up....eg install all her the apps and themes the way she had them before the firmware update.
It's really important I nail this, as this is the first time we have gone SIM free and I don't want to be going back to paying extra for contracts just because we need the wifi calling. (And we both hate the three in touch app)....so my success with this will be important for the next phones we buy.
NightOrchid said:
Firstly, there are Dozens and dozens of flash guides all over the web on flashing a SS phones with ODIN, 2nd'ly, its one of the easiest phones to flash..
Before you do anything download and install the latest SS USB drivers.. plug your phone in so they are detected.. then goto>settings and turn ON USB debugging in developer options.. plug in phone again.. so the device is detected again, then unplug... this installs the (A)ndroid (D) ebug (B)ridge driver, leave USB Debugging ON..
Your questions:,,
1) Yes H3G is 3UK... also EE use wifi calling..
2) Yes, it will wipe her phone... When you download your H3G firmware.. there are 2 CSC files in the folder.. I recommend using CSC... do not use HOME_CSC
3) No it will not void the warranty... its only when you trip KNOX by rooting, or custom roms that you invalidate warranty... Stock is fine
4) Yes it will... you will have to get an Unlock code to SIM unlock her phone.. SIM Unlock.. is not Flashing a rom.. What makes SS devices so cool.. is that you can flash any stock rom from any provider.. and it doesnt affect the bootloader, so you could flash an unbranded (open), EE or O2 rom on your 3 SIM locked phone..
5) Theres so many on the web and on XDA for SS phones and ODIN flashing, just type "Galaxy S8 back to stock" into search. My advice.. READ READ and more READ the guides ALL THE WAY Through, before you do ANYTHING AT ALL.. and make sure the phone you have has no SIM locks or security locks on it before you start.
6) Never heard of this... its only a stock rom your flashing, youll be fine
7) If 3 support Wifi Calling and the Rom your flashing has it coded in, then Yes it should work fine. EE also support Wifi calling
8) Yes... its a STOCK Rom with a STock recovery and STOCK Knox... so you will recieve updates according to when they are rolled out by that prvider... So, if its a 3 Rom, youll get updates when 3 push them out... if its an O2 rom, youll get them from O2.. and so on.... That is why soo many people flash Unbranded/Unlocked Open Roms... because unlocked phones have, in the past, gotten updates first and factory unlocked phones / roms dont come with Bloatware / carrier rubbish apps installed ..
Remember.. Just READ everything
Hope this helps
Click to expand...
Click to collapse
Hi....i seem of got myself in a pickle.
I read countless amounts of guides and watch loads of videos but still not gone right. (Phone isn't broken thankfully)
Basically I do everything guides tell me, but it's when I press start on odin the problem happens. It doesn't fail but it doesn't progress....on the text box it stops at a point that says Nand START (something like that) but doesn't get past that point....i sat for an hour the first time I tried it and 30 mins every time after that. Another thing it does is at the top where you get the green loading bar....that part goes white and says something like select Partition (not near my pc at the mo and when I was with the pc my wife had my phone, so couldn't take a photo)
I have 3 solutions that could be causing the problem but I just want to get a second opinion.
1. I read everywhere about device drivers and I was under the impression that they downloaded automatically when I plugged the phone to the pc....is there secondary drivers I need to download (sorry for the basic question)
2. My odin wasn't the latest version....i was using odin 3.09 and now there is odin 3.13 (I think) will using the latest version stop this problem.
3. I wonder if my antivirus is blocking it....do antivirus's ever get in the way of flashing firmware.
Hope some can help before tonight
Owenboy89 said:
Hi....i seem of got myself in a pickle.
I read countless amounts of guides and watch loads of videos but still not gone right. (Phone isn't broken thankfully)
Basically I do everything guides tell me, but it's when I press start on odin the problem happens. It doesn't fail but it doesn't progress....on the text box it stops at a point that says Nand START (something like that) but doesn't get past that point....i sat for an hour the first time I tried it and 30 mins every time after that. Another thing it does is at the top where you get the green loading bar....that part goes white and says something like select Partition (not near my pc at the mo and when I was with the pc my wife had my phone, so couldn't take a photo)
I have 3 solutions that could be causing the problem but I just want to get a second opinion.
1. I read everywhere about device drivers and I was under the impression that they downloaded automatically when I plugged the phone to the pc....is there secondary drivers I need to download (sorry for the basic question)
2. My odin wasn't the latest version....i was using odin 3.09 and now there is odin 3.13 (I think) will using the latest version stop this problem.
3. I wonder if my antivirus is blocking it....do antivirus's ever get in the way of flashing firmware.
Hope some can help before tonight
Click to expand...
Click to collapse
Hi again everyone.
I feel like I am talking to myself here. I have managed to sort it.
I downloaded some secondary device drivers for her phone and then update odin to, Odin v3.12.7 and it worked first time.
I also used the original charging cable instead of the official charging cable for the gear 360 camera.
To restore her data, I backed up to samsung cloud in the settings, signed her in and restored the date I backed up....didn't originally think it would be any good but I am impressed.
Result is I have a phone that has wifi calling and I read somewhere that if you take the SIM out of your phone when you download the firmware it doesn't SIM lock the phone.....and it seems to have worked. (Not sure how true it is or if I was just lucky)
Hope this thread helps, I want to cover a few different things in it and learn something on the way.
(Thanks to the person that commented and supplied most of the info in this thread)
#happywifehappylife
Hi everyone.......again.
My last post I promise.
I wrote a bit of a guide for myself for when I need to do this again. I thought would post it here so people can see it and use it if they wish.
(The notes before the method is apart of my guide. Hope it all helps)
Notes Before The Method
the cable you are using to connect to the pc should be the original charging cable. (If you don't have the original then use the one your using and see if it works but try to find a official Samsung charging cable)
Your phone needs to be at least at 60% battery.
Older phones sometimes don't work with newer versions of Odin so if this is happening download a older version.
If it's a new phone and you want to personalize it from scratch then no need to back up and restore any data.
After removing your memory card, plug it into your computer using a memory card extension and copy photos to your computer. Just in case the phone formats the memory card when entered back in to the phone, after the firmware is installed.
Method
1. Go to Sammobile via Google chrome in incognito mode. (If you don't do this they will re-direct you to a sign up page, everytime you press download)
2. Download Firmware, find this by picking the lastest firmware thats with your network and match the Baseband version or the last part of build number. (found in system info in the settings)
3. Install the latest version of Odin and install secondary device drivers on your pc/Laptop.
4. (On your mobile) back up your data in the samsung cloud.
Setting>Cloud and Accounts>Samsung Cloud>Backup settings> Back up.
If you have a memory card, move all your photos ect, to it and remove it from your phone.
5. Go into setting and tap build number 7 times to unlock developer options. After unlocking it, enter developer options and enable usb debugging.
Setting>developer options>USB Debugging.
6. Once the firmware file has stopped downloading on your pc extract it and send send it to your Downloads File.
7. Open Odin and load each part of firmware in the right box e.g. AP with AP, BL with BL, CSC with CSC ect (Do not load up Home CSC this is used for when your moving a branded device to another brand, E.g. EE to 3)
8. Before you plug your phone up to the computer. Turn your phone off and enter Odin mode(Download mode). Each device has a different way of doing this so just google how to do it on your specific device.
9. Once your phone is in download mode plug it into the computer and press start. This should take a few minutes but some files may take longer.
10. Once the Odin confirms the process is done, by showing the pass sign unplug your phone and turn it on. (First time you turn it on May take a minute or two to load. )
11. Enter your google email and password, and restore all your data on google.
12. Then enter your Samsung user and password, after that press restore and choose the date you backed up on before you flashed your phone (at point 4)
13. Enjoy....your all done.
Hi All.
Thank you for any help you might give me in advance with this issue...
Last week, I tried to root the phone with the SM-G930P CF-Autoroot heroqltespr files with Odin found in this forum. I have rooted a few other phones but am no expert. The root after a few attempts failed (verified a few ways), however, some files must have been affected because the phone "identifies" as heroqltespr. Identifies as when I could plug into my PC heroqltespr would be the name. It was not set this way in the obvious name your device areas. I ended up doing a hard reset to clear the phone and other than the ghost naming everything was working fine.
A day or 2 ago Sprint rolled out a new OTA update which the phone installed. Since then the phone was draining battery life. After uninstalling and reinstalling the SD card today, it seems to have tripped a "Security Notice: Unauthorized Actions". That is when the trouble started. The phone started running hot, basically leaking battery power, and was all lagging. I'm assuming the CPU going Ludicrous speed.
Now, I am in a Samsung Splash screen loop, or or a recovery loop. The only thing it does is go into download mode.
I have tried flashing stock firmware, it fails. I've tried flashing with and without the SD or Sim card. Not really sure what I should be doing. The "P" version of my phone seems to be the bastard child of S7s. Any help you guys cold give me would be great. THANK YOU!
The Download Screen Reads:
Odin Mode (High Speed)
Current Binary: Samsung Official
System Status: Custom
FAP Lock: Off
Warranty Void: 8x8
Qualcomm Secure Boot: Enabled
AP SWREV: 85(2,1,1,1,1) K1 S4
I get this error when I try to flash back to stock SW REV CHECK FAIL : [ABOOT]FUSED 5 > BINARY 4
Stupid question but is your phone in a case?
Sw rev check fail : [aboot]fused 5 > binary 4
freakboysays said:
Stupid question but is your phone in a case?
Click to expand...
Click to collapse
No it isn't.
I get this error message on the download screen. SW REV CHECK FAIL : [ABOOT]FUSED 5 > BINARY 4
I fixed it.
5 > BINARY 4 error, has to do with a Version 5 bootloader Sprint came out with in 2018. The fact that this is only affected by the SM-G390P further complicates things for the average user. Users on version 5 bootloader will need to wait until/If a version 5 universal bootloader for the SM-G930U to get unbloated firmware. Information on restoring your S7 SM-G930P to where you left off before you started trying to root your phone can be found below. More info on Sprint F'n us and BL Version 5 can be found here
https://www.arencambre.com/blog/2018/01/01/fused-firmware-version-locks-samsung-s7/comment-page-1/. There was a post on XDA (which I can't find) which gave the idea that Sprint came out with this version 5 bootloader to prevent people from flashing the phones to the U version and going overseas with them.
The stock files for the first version of Sprint Version 5 bootloader firmware dated 1-1-18 can be found here:
https://www.sammobile.com/firmwares/galaxy-s7/SM-G930P/SPR/download/G930PVPS5BRA1/206876/
Unzip. Only have auto reboot and Re-partition checked as options in Odin.
If you dont mind me asking, did you ever find a way to root the G930P with the 5th bootloader updates? Is it even possible at this point in time? Im new when it comes to rooting but with the amount of time Ive spent browsing the web it seems as if there is nothing. Thanks.
tonysak said:
I fixed it.
5 > BINARY 4 error, has to do with a Version 5 bootloader Sprint came out with in 2018. The fact that this is only affected by the SM-G390P further complicates things for the average user. Users on version 5 bootloader will need to wait until/If a version 5 universal bootloader for the SM-G930U to get unbloated firmware. Information on restoring your S7 SM-G930P to where you left off before you started trying to root your phone can be found below. More info on Sprint F'n us and BL Version 5 can be found here
https://www.arencambre.com/blog/2018/01/01/fused-firmware-version-locks-samsung-s7/comment-page-1/. There was a post on XDA (which I can't find) which gave the idea that Sprint came out with this version 5 bootloader to prevent people from flashing the phones to the U version and going overseas with them.
The stock files for the first version of Sprint Version 5 bootloader firmware dated 1-1-18 can be found here:
https://www.sammobile.com/firmwares/galaxy-s7/SM-G930P/SPR/download/G930PVPS5BRA1/206876/
Unzip. Only have auto reboot and Re-partition checked as options in Odin.
Click to expand...
Click to collapse
I got screwed by this, I accidentally installed the P firmware, and now I cannot load U firmware because of this 5 > 4 error. I went to the blog you posted (arencambre), and I am only able to install the U firmware modem (CP package in Odin), everything else has to be P. And because of the P firmware, I am unable to edit APN settings to enable my native Hotspot. Is there anything I can do, besides wait for U firmware to come out with a Version 5 bootloader?
Chanman said:
I got screwed by this, I accidentally installed the P firmware, and now I cannot load U firmware because of this 5 > 4 error. I went to the blog you posted (arencambre), and I am only able to install the U firmware modem (CP package in Odin), everything else has to be P. And because of the P firmware, I am unable to edit APN settings to enable my native Hotspot. Is there anything I can do, besides wait for U firmware to come out with a Version 5 bootloader?
Click to expand...
Click to collapse
EDIT: Nevermind...sounds like you aren't on sprint.
lvpre said:
EDIT: Nevermind...sounds like you aren't on sprint.
Click to expand...
Click to collapse
Actually, I am on Sprint, and your directions were awesome, thank you so much! The only thing I had to do was change the line to:
settings put global tether_dun_apn "APNDUN,n.ispsn,,,,,,http://mms.sprintpcs.com,68.28.31.7,80,310,120,,default,dun,mms,supl"
I'm going to put a link to the thread so others can refer to it. https://forum.xda-developers.com/sprint-s7-edge/how-to/hotspot-bypass-nougat-ok-t3563446
Hi all,
EDIT: I posted this in another thread that was about two years old, where I followed the instructions that caused this: https://forum.xda-developers.com/sp...msung-galaxy-s7-sm-g930p-root-xposed-t3503599
That thread seems dead-ish and if you managed to fix this issue maybe you can help me also. Also what was lvpre's original post before he edited it, and would it apply here?
So the worst has happened - got a new (used) phone from Boost Mobile, tried this guide, and now I can only boot to the "An error has occured while updating the device software. Use the Emergency Recovery function in the Smart Switch PC software." screen. Sometimes it does take me to the original "Download mode" screen.
Now, I should be able to resolve this by flashing the original firmware correct? (As in, the firmware that was installed when it came)? Or does it just need to be firmware from the same date range that has the same bootloader? ODIN will still let me attempt flashing on this screen, but I still get the same error when I try again, which on the Download mode screen showed "SW REV CHECK FAIL : [system]Fused 4 > Binary 1"
Any advice here? My S6 bricked when somehow OEM unlock enabled itself and I can't get around the FRP lock, I will be VERY annoyed if the same thing happens with a NEW phone. If I can't fix this I am never buying Samsung again. Any advice on this is very welcome! I emailed Boost to ask them which firmware is installed (because I'm an idiot and didn't write it down but have never had flashing go this wrong before).
EDIT: Booting to recovery just shows a blue "RECOVERY BOOTING...." for a second in the corner and gives a recovery bootloop, just keeps flashing that.
EDIT: I apparently tried to flash an earlier bootloader/etc through ODIN according to the directions in the post I linked above, and after that I now have this problem. Nobody else in the thread seems to have had this problem, and your post is the closest to anything I can find on this issue. I would be in your eternal debt if you could help me out here.
PLEASE HELP!
EDIT: Theoretically if I can find the original firmware it was on I should be fine, right? Everywhere I read if flashing goes wrong you just flash the original stock on it. I guess worst case scenario I download gigs upon gigs of firmwares for Sprint 930P over the last year and find the one that sticks? Or is the fact my recovery is bootlooping and I can only go into download mode mean I'm bricked?
Hello all,
To follow up on my last post, I found success restoring to stock via this firmware:
G930PVPU4BQH1_G930PSPT4BQH1_SPR_7.0.zip
https://www.androidfilehost.com/?fid=817550096634799807
I left my original post just in case anyone messes this up the way I did. I still need root, but now I know how to reset to stock in the event this happens again.
For the record I bought a used Samsung Galaxy S7 off the Boost website.
IF YOU FOLLOW THIS GUIDE, OR ANY, MAKE SURE TO GO INTO "SETTINGS -> ABOUT PHONE" AND MARK DOWN WHAT FIRMWARE THE PHONE IS CURRENTLY ON AS STOCK. THIS WILL SAVE YOU A HEADACHE TRYING TO FIGURE OUT WHICH FIRMWARE YOU NEED TO DOWNLOAD IF THINGS GO WRONG. DO NOT PAY FOR A FIRMWARE DOWNLOAD OR USE FILESHARE SITES, GO HERE: https://simunlockremote.com/galaxy-s-series-firmware/ AND FIND THE VERSION YOU ARE ON AND IT WILL DIRECT YOU TO A FAST GOOGLE DRIVE LINK.
Thanks to all the hard work all the devs have done that have gotten use. I still need root soooooooooo if anyone knows how to do that let me know!
CHEERS! I am so happy right now
slvmecha said:
Hello all,
To follow up on my last post, I found success restoring to stock via this firmware:
G930PVPU4BQH1_G930PSPT4BQH1_SPR_7.0.zip
https://www.androidfilehost.com/?fid=817550096634799807
I left my original post just in case anyone messes this up the way I did. I still need root, but now I know how to reset to stock in the event this happens again.
For the record I bought a used Samsung Galaxy S7 off the Boost website.
IF YOU FOLLOW THIS GUIDE, OR ANY, MAKE SURE TO GO INTO "SETTINGS -> ABOUT PHONE" AND MARK DOWN WHAT FIRMWARE THE PHONE IS CURRENTLY ON AS STOCK. THIS WILL SAVE YOU A HEADACHE TRYING TO FIGURE OUT WHICH FIRMWARE YOU NEED TO DOWNLOAD IF THINGS GO WRONG. DO NOT PAY FOR A FIRMWARE DOWNLOAD OR USE FILESHARE SITES, GO HERE: https://simunlockremote.com/galaxy-s-series-firmware/ AND FIND THE VERSION YOU ARE ON AND IT WILL DIRECT YOU TO A FAST GOOGLE DRIVE LINK.
Thanks to all the hard work all the devs have done that have gotten use. I still need root soooooooooo if anyone knows how to do that let me know!
CHEERS! I am so happy right now
Click to expand...
Click to collapse
Don't take any updates. My edited post was on how to get hotspot working. There is a thread here about it, but I changed a line of code.
Switched from Sprint to T-Mobile. Am I out of luck?
lvpre said:
Don't take any updates. My edited post was on how to get hotspot working. There is a thread here about it, but I changed a line of code.
Click to expand...
Click to collapse
I've got a Galaxy S7 G930P from Sprint. I just switched to T-Mobile a couple months ago and brought my S7 phone with me. I was hoping to flash my rom to either the G930U or the G930T (T-Mobile) version, but both are still bootloader v4 and I hit the same error that everyone else on this thread was hitting.
My main problem is that my S7 phone can't send/receive MMS messages on T-Mobile, even after updating the APN settings, and, even worse for me personally - my phone gets below average reception everywhere I go, presumably because my Sprint G930P rom has locked down some of the bands that T-Mobile uses.
Aside from getting a new phone, do I have any options? Or am I stuck waiting for either a G930T or a G930U update based on bootloader 5?
jbuck2 said:
I've got a Galaxy S7 G930P from Sprint. I just switched to T-Mobile a couple months ago and brought my S7 phone with me. I was hoping to flash my rom to either the G930U or the G930T (T-Mobile) version, but both are still bootloader v4 and I hit the same error that everyone else on this thread was hitting.
My main problem is that my S7 phone can't send/receive MMS messages on T-Mobile, even after updating the APN settings, and, even worse for me personally - my phone gets below average reception everywhere I go, presumably because my Sprint G930P rom has locked down some of the bands that T-Mobile uses.
Aside from getting a new phone, do I have any options? Or am I stuck waiting for either a G930T or a G930U update based on bootloader 5?
Click to expand...
Click to collapse
If your phone is uicc [sim] unlocked from sprint... you can try the following.
1. Odin a dec/Jan firmware...like QJ3. But replace the cp slot with the file from the latest u firmware. This is the modem file.
2. When your phone starts, you will receive a pop up message, just hit cancel.
3. Install a package disabler like sabs, bk, adhell2. Disable securitylogagent . This should remove the annoying message. Sabs takes a little effort to setup, but you may need it for the disabler part. Restart after disabling.
4. Pop in sim. See if the additional bands are unlocked.
If you fail, you can always just odin back to a v5 sprint firmware. But don't try it unless you are stuck on the current firmware and your phone is doing nothing. It won't brick your phone.
While the firmware is not downloadable, modem files can downgrade one major update.
This worked for me, but I only have sprint and haven't tried it elsewhere.
Here is an article https://www.arencambre.com/blog/2018/01/01/fused-firmware-version-locks-samsung-s7/comment-page-1/
Is this triggers the knox counter ?