Can you carrier switch on Oreo? - Samsung Galaxy S8 Questions and Answers

I have done the other methods of flashing HOME_CSC and changing it in Nougat succesfully, or using the *#23... code. However, I'm unable to find if we can flash or change the Oreo CSC. I have flashed HOME_CSC on Oreo with PrinceComsey but it doesn't seem to do anything.
I've flashed Oreo and gone back to Nougat, searched and searched but haven't found an answer.
If anyone can help. Thanks.

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help flashing stock firmware galaxy s7 edge telus 935w8

I have downloaded a file for flashing stock firmware from telus with july updates, it contains several files. I have rooted and installed xposed on my stock firmware and I want to get rid of the installed system root and xposed flashes. The only way I can figure is to flash a stock rom back. What do I flash to do this? AP/CSC? seeing as this rom is an update as well I imagine I will have to flash bootloader too. Any advice or general walkthroughs or links would be greatly appreciated.
anyone?
in case anyone finds this I was able to flash and YES it flashes the boot.img and recovery.img but not csc or home. Which I dont really mind at all. When flashing over previous stock rom it upgraded the rom and all my stuff and cleaned out the system too! encryption is back and i can lock the phone, rooted it and was able to still have lock and encryption

Can't restore G930P Firmware

Ok so here's my issue
For a very long time since the G930U firmware was available to install, I've been using that. Well I decided to want to get my phone unlocked for GSM using those services but it needs Stock Firmware.
So I tried to restore to the latest G930P firmware and ODIN is giving a Volume size error for the system.img.ex4. I've tried now a couple different firmwares and no luck. Any idea?
The latest Firmware is PH7 I don't recommend it. PG1 on down are good to go. Extract zip stock firmware to a folder and add it in to Odin all the slots accordingly. BL AP CP CSC the last slot CSC is HOME_CSC not CSC_SPT and start flashing. It always works for me.
I ended up figuring it out. I had to find the stock G930P .PIT mapping's and re-partition because G930U ended up changing the sizes.
Oh good to know. Thank for sharing
Why do you not recommend PH7 update? I've heard it helps with battery life.
Could you share the pit file you used. I tried the same thing with a pit file i found online how ever since the pit i am able to flash bootloader but unable to flash system.ext4. Odin gives me a "failed (auth)" and neyjer the 930u version or the f2 or any of the other stock roms wont flash.... Help please
Don't you just love it when people "figure it out" and then don't share how? lol
Here... Since nobody gave you this. This may not be your problem.
https://drive.google.com/file/d/0BzyeAt2hy6XeenhWM2dNSU40TDA/view?usp=sharing

Flashed wrong fw

Today after i updated to android nougat I tried to flash with odin firmware (SM-G930T_1_20160704090453_jo3tv4r6ht_fac) to go from 930p to 930u but it failed, and after that my phone doesnt want to restart, when i want to trun on recovery menu it crashes after 5 sec and reboot again, i can turn on download mode and try flashing some other firmware to repair my nougat one. Anyone have nougat fw for 930p so I can flash it and make my phone work correctly, or maybe i can downgrade to lower fw. Please help me and give advice how i can fix this. Nougat was working correctly but flashing the SM-G930T_1_20160704090453_jo3tv4r6ht_fac was a mistake and I ****ed up my phone.
@edit I just flashed it with APJ2 and it is working fine again. We can close this
Was there any other people besides you that had flashed that firmware? lol i would never do that to an 800 dollar phone unless it's a community that flashed that firmware then maybe i would. Try browsing sammobile for the firmware. The software version for nougat is BQAA. Hope i helped.

S7 Edge G935T accidental flash to G935A

If anyone can help me i'm fairly new here! and I am not sure if this is the right place to post this but i accidentally flashed G935A firmware to the G935T in an attempt to get into system binary. Which I did but now im having trouble flashing it back to stock. if anyone can be of help, I have tried downloading some different firmware and tried flashing it through odin and Octoplus but no far not so much luck.
There shouldnt be any issue unless somehow the bootloader version is different. Did you try both version of Odin? Try smartswitch's firmware reinstall if that doesnt work.

[SOLVED] How to downgrade S7 Edge SM-G935FD from android 8.0 Oreo to Official 7.x?

Hello, I have recently installed Android 8.0 (Unofficial) on my S7 edge as mentioned in this thread by ProtoDeVNan0. And also installed TWRP recovery as explained here to upgrade it. After installation figured that it has some issues with some features.
So now I am trying to downgrade to the latest official firmware.
But every time I download and install the official firmware zip file using TWRP, it says the zip file is corrupt. So I tried downloading from different sources and still it says it is corrupt in TWRP.
And then I tried using Odin after extracting the Zip file. Using the tar.md5 files inside it. It fails as well.
And also found no way to install the official recovery.
Is there any way I can downgrade from 8.0 to official 7.0? And also I would like to remove TWRP and install official recovery. Basically returning it to its original state.
Searched a lot and found no possible ways to do so.
Please help. Thank you
SOLUTION:
I have found the solution to the issue.
I previously tried using odin to load all the packages in the zip file all together which was the reason i was getting the error.
The solution is to tick and select AP file only in odin and start.
(in case stuck at meta-data unplug)
Then reset odin and re-start the phone into download mode again.
Now tick and select the CSC file (not HOME_CSC), and then start.
After the phone reboots, a factory data reset will occur and phone boots up.
Why are you using TWRP to attempt to install Official samsung firmware?
You do it all through ODIN, it'll put your device back to basically original setup state with stock firmware. Flash with CSC and not home_CSC, I assume you have no data you will need to backup before hand.
More info here:
http://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
Which Version you use odin? I try your solution but dont work on my g935f?
BL not downgraded!
khan0412 said:
Hello, I have recently installed Android 8.0 (Unofficial) on my S7 edge as mentioned in this thread by ProtoDeVNan0. And also installed TWRP recovery as explained here to upgrade it. After installation figured that it has some issues with some features.
So now I am trying to downgrade to the latest official firmware.
But every time I download and install the official firmware zip file using TWRP, it says the zip file is corrupt. So I tried downloading from different sources and still it says it is corrupt in TWRP.
And then I tried using Odin after extracting the Zip file. Using the tar.md5 files inside it. It fails as well.
And also found no way to install the official recovery.
Is there any way I can downgrade from 8.0 to official 7.0? And also I would like to remove TWRP and install official recovery. Basically returning it to its original state.
Searched a lot and found no possible ways to do so.
Please help. Thank you
SOLUTION:
I have found the solution to the issue.
I previously tried using odin to load all the packages in the zip file all together which was the reason i was getting the error.
The solution is to tick and select AP file only in odin and start.
(in case stuck at meta-data unplug)
Then reset odin and re-start the phone into download mode again.
Now tick and select the CSC file (not HOME_CSC), and then start.
After the phone reboots, a factory data reset will occur and phone boots up.
Click to expand...
Click to collapse
STILL NOT DOWNGRADED!!
You can apply the solution described above (using ODIN to flash AP, CP and CSC with a previous version of firmware). However, the Boot-loader will remain under the latest version (since January 2018 update).
The problem is drastically worst for those who used to patch certificates before the January 2018. For those users, I will advise to not install the update from January 2018 because, they will not find any tools currently available to patch certificates and get the phone work a new. They can try but it will not be successful and the phone will keep saying "Emergency call only" or "not registered on network".
Anyone having successful experience to inform others please!
Thank you.
M. T. Coulibaly
Yes it Solved. You Need to have Stock Firmware of March , and extract PIT File, then flash Firmware with PIT File.
In Options tab check "F. Reset Time", "Auto Reboot", "Nand Erase", "Re-Partition" and "Phone Bootloader Update". Rest options must be UNCHECKED!!!
If anyone need Firmware of March for G935F and the PIT , then let me know.
HELP Corrupt Zip Stock ROM TWRP
..
therealchris said:
..
Click to expand...
Click to collapse
You must Flash it with Odin, with PIT , you must do it how i sad it in my last Post. I Upload Firmware and PIT now to Mega.
Please, someone help me
Sorry if my english is not good, i'm confused where to go for help.
I also experienced the same problem. I just tried installing android 8.0 (from the same link and way as you explained) and it works. but after I tried several times, a lot of bug that makes me uncomfortable.
So I plan to restore it to the official/original firmware version as before. I've tried using odin and also the same as you experienced, always fail when installing BL. And AP, CP, CSC works well.
Then, what should i do?
Can someone please help explain to me more clearly? with more easily understood words. My English is not very good, I still have to use translator for sentences that I do not understand. I would appreciate your help.
Thank you
Help me
Serbian_Andro said:
Yes it Solved. You Need to have Stock Firmware of March , and extract PIT File, then flash Firmware with PIT File.
In Options tab check "F. Reset Time", "Auto Reboot", "Nand Erase", "Re-Partition" and "Phone Bootloader Update". Rest options must be UNCHECKED!!!
If anyone need Firmware of March for G935F and the PIT , then let me know.
Click to expand...
Click to collapse
Please, someone help me
Sorry if my english is not good, i'm confused where to go for help.
I also experienced the same problem. I just tried installing android 8.0 (from the same link and way as you explained) and it works. but after I tried several times, a lot of bug that makes me uncomfortable.
So I plan to restore it to the official/original firmware version as before. I've tried using odin and also the same as you experienced, always fail when installing BL. And AP, CP, CSC works well.
Then, what should i do?
Can someone please help explain to me more clearly? with more easily understood words. My English is not very good, I still have to use translator for sentences that I do not understand. I would appreciate your help.
Thank you
How to downgrade from Official Oreo to Nougat
khan0412 said:
Hello, I have recently installed Android 8.0 (Unofficial) on my S7 edge as mentioned in this thread by ProtoDeVNan0. And also installed TWRP recovery as explained here to upgrade it. After installation figured that it has some issues with some features.
So now I am trying to downgrade to the latest official firmware.
But every time I download and install the official firmware zip file using TWRP, it says the zip file is corrupt. So I tried downloading from different sources and still it says it is corrupt in TWRP.
And then I tried using Odin after extracting the Zip file. Using the tar.md5 files inside it. It fails as well.
And also found no way to install the official recovery.
Is there any way I can downgrade from 8.0 to official 7.0? And also I would like to remove TWRP and install official recovery. Basically returning it to its original state.
Searched a lot and found no possible ways to do so.
Please help. Thank you
SOLUTION:
I have found the solution to the issue.
I previously tried using odin to load all the packages in the zip file all together which was the reason i was getting the error.
The solution is to tick and select AP file only in odin and start.
(in case stuck at meta-data unplug)
Then reset odin and re-start the phone into download mode again.
Now tick and select the CSC file (not HOME_CSC), and then start.
After the phone reboots, a factory data reset will occur and phone boots up.
Click to expand...
Click to collapse
after trying for many days got this Solution.
The baseband should be same or higher of the firmware to downgrade.
Example: G935FXXU2DRAG Oreo
G935FXXU1DRAG Nougat ( will not happen.)
Both should be same I mean the U2 in the middle.
Or u can downgrade upgrade from U1 oero to U2 Naugat. But not from U2 to U1 Baseband.
Hope it helps.
Just download last nougat release and flash it using latest odin simply guys,
I have tested, no one needs to use pit file or nand erase etc. Use samfirm to download latest firmware for your model. Then use latest odin to flash. Be sure to use normal csc file, NOT the home csc. You don't need pit file when using normal csc, its included with it.
If you used twrp recovery etc to flash unofficial oreo releases, you need to first confirm if oem unlock is enabled, don't tick on auto reboot option, just tick F.reset from odin options, then first flash latest nougat for your region through odin, then flash twrp through odin. Then when odin says pass, force reboot into twrp recovery from download mode, then format data in twrp and flash super SU/magisk and no verity opt encrypt. Then reboot and you will be good.
Sent from my S7 Edge using XDA Labs
Serbian_Andro said:
Yes it Solved. You Need to have Stock Firmware of March , and extract PIT File, then flash Firmware with PIT File.
In Options tab check "F. Reset Time", "Auto Reboot", "Nand Erase", "Re-Partition" and "Phone Bootloader Update". Rest options must be UNCHECKED!!!
If anyone need Firmware of March for G935F and the PIT , then let me know.
Click to expand...
Click to collapse
I need the link for march firmware please. Thanks a lot
can't downgrade
odin gives "FAIL" when starting the procedure.
i have the U1 nougat version and the U2 oreo version.
can't seem to find U2 nougat ( if any) and I guess upon upgrading to OREO sonething had changed and can't downgrade anymore.
I managed to get into android recovery and did a factory reset and total wipe but nothing, through ODIN flashing doesn't work.
Any ideas anybody ? I really want to downgrade so I will be able to install stock nougat, and flash an oreo custom ROM with magisk in order to get around the KNOX triger thing.
tks
doron
doronwin said:
odin gives "FAIL" when starting the procedure.
i have the U1 nougat version and the U2 oreo version.
can't seem to find U2 nougat ( if any) and I guess upon upgrading to OREO sonething had changed and can't downgrade anymore.
I managed to get into android recovery and did a factory reset and total wipe but nothing, through ODIN flashing doesn't work.
Any ideas anybody ? I really want to downgrade so I will be able to install stock nougat, and flash an oreo custom ROM with magisk in order to get around the KNOX triger thing.
tks
doron
Click to expand...
Click to collapse
You can't flash U1 nougat on U2 oreo firmware. It has been all over xda that U2 firmwares has Version 2 bootloader which can't be downgraded to Version 1 bootloader of U1 firmwares. Nougat has many U2 firmwares, you simply need to search..
Sent from my S7 Edge using XDA Labs
bluetooth start works but need switch off battery optimization
Hello everyone
I found it!!!
Problem with your bluetooh connection after upgrade can be solved in one of the way follow previous post or "disable battery optimization.
I try before swichng off and on all networks, emergency mode etc. and nothing happen.
Disable battery optimization
Sometimes battery optimization also messes up with Bluetooth connections. I suggest you check battery optimization settings and remove Bluetooth from it. To do so, follow the steps:
Open device Settings and go to Battery. There is few ways to go there:
first can be: open settings go to "device maintenance">>>clik on "battery">>>clik on "batterry usage">>>clik on 3 dots right top corner>>>then clik "optimise battery usage">>> and u are there - swich off “Bluetooth MIDI service” and apps that you use with Bluetooth such as Play Music, Phone, youtube, maps etc.
2nd
open settings Tap the 3-dot menu present at the top right corner and select “Battery Optimization”.
Turn off Battery Optimization for “Bluetooth MIDI service” and the apps that you use with Bluetooth such as Play Music, Phone, youtube, maps etc.
therealchris said:
..
Click to expand...
Click to collapse
Serbian_Andro said:
Yes it Solved. You Need to have Stock Firmware of March , and extract PIT File, then flash Firmware with PIT File.
In Options tab check "F. Reset Time", "Auto Reboot", "Nand Erase", "Re-Partition" and "Phone Bootloader Update". Rest options must be UNCHECKED!!!
If anyone need Firmware of March for G935F and the PIT , then let me know.
Click to expand...
Click to collapse
hello...have problem to downgrade from u3 to u2 ...can you help me please ??
Downgrading from U3 Oreo to Naugat
justmemike said:
hello...have problem to downgrade from u3 to u2 ...can you help me please ??
Click to expand...
Click to collapse
Hello. I 've read all the topics and youtube comments about downgrading from oreo.
My oreo is U3,and everyone know that nougat is U2.
So that means we can't downgrade from u3 oreo to nougat u2.
Anyone if knows something,please,pleeeease tell me.
I really need nougat...
nar3k said:
Hello. I 've read all the topics and youtube comments about downgrading from oreo.
My oreo is U3,and everyone know that nougat is U2.
So that means we can't downgrade from u3 oreo to nougat u2.
Anyone if knows something,please,pleeeease tell me.
I really need nougat...
Click to expand...
Click to collapse
I think i've already tried anything to make downgrading possible but no luck,
Serbian_Andro said:
Yes it Solved. You Need to have Stock Firmware of March , and extract PIT File, then flash Firmware with PIT File.
In Options tab check "F. Reset Time", "Auto Reboot", "Nand Erase", "Re-Partition" and "Phone Bootloader Update". Rest options must be UNCHECKED!!!
If anyone need Firmware of March for G935F and the PIT , then let me know.
Click to expand...
Click to collapse
--------------------
My Samsung S7 edge upgraded to Oreo with Binary U3. I would like to downgrade to Nougat. If your PIT file can help me with this then please share with me.
awaism81 said:
--------------------
My Samsung S7 edge upgraded to Oreo with Binary U3. I would like to downgrade to Nougat. If your PIT file can help me with this then please share with me.
Click to expand...
Click to collapse
it ain't possible man, I've already tried that

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