Database Users

[Q] G900F Network registration problem after flashing

Hi I have international version of S5 G900F. I flashed the phone with UK BTU stock rom. Now the problem is I cannot connect to the Network.
I tried going to Settings->More Networks -> Network Operators -> Select automatically . It took 5-10 mins to search but cannot connect.
Sim is not locked as it was working before I flashed the stock rom. also I read somewhere in internet that once the phone is region unlocked, it is permanently unlocked to use any other country sim. I don't know the original region of my phone but I bought it in Uk from 3rd party dealer not from any carrier.
I can think of two thing at the moment. It should be either regional locked again, but it does not prompt any thing to activate or enter pin or anything like that. or it should be wrong modem.
Is there a way to find if the phone is region locked ?
and is there a way to find correct region of the phone ?
the label on the box was removed so I cannot find from the box as well.
Thanks in advance.

I still haven't fixed this problem. Could someone suggest how to fix?

I've attached some screenshots with my phone info.
first image shows NETWORK:UNBLOCKED and IMEI Certi: PASS
-> I think this means, the phone is not blocked by network, and IMEI certificate has passed so it's not stolen or lost claimed phone.
another screenshot is the Firmware and CSC code/country information,
-> this means, this phone is build to sell in UK, so UK sim should unlock the regional lock.
Also the phone was working fine before I installed stock rom which I dowloaded from sammobile.
in the sceenshot, one of the network is connected but it says emergency call only because it cannot register to the network.
It is not sim lock also, because when I put T-mobile sim it does not ask for pin to unlock also.
what is wrong here. any idea guys? xda supposed to be the biggest android forum and samsung s5 is one of the most popular phone at the moment, isn't there anyone who have similar problem and solved? or atleast give some reason this cannot be fixed at all.

does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?

blesio said:
does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?
Click to expand...
Click to collapse
I've tried with Orange sim, and it still cannot register to the network. When I put the orange sim, it pop up a dialogbox asking to choose a network provider, there was two options, T-mobile and orange. So it is detecting the sim, but it cannot register.
And also, I tried my sim in another phone, and my sim works in another phone without any problem.

Did you try to flash the firmware again, and then after that restore factory defaults?

blesio said:
Did you try to flash the firmware again, and then after that restore factory defaults?
Click to expand...
Click to collapse
Yes I did, still it didn't work. I emailed samsung customer service with the problem, and they asked me to restore factory defaults.
I did that again but didn't work.
I tried one custom ROM as well. same problem in that rom.

You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?

blesio said:
You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?
Click to expand...
Click to collapse
I've installed stock rom several times, and several different versions( from here: http://www.sammobile.com/firmwares/1/?model=SM-G900F&pcode=0 ). Rooted several times, installed modem.bin files several times from many custom rom/ stock rom. None of them worked. I tried installing modem.bin when not rooted as well. And all the attempt failed.
I did everything I could possibly think of , Then I posted the question in the forum.

You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F

lwiss said:
You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F
Click to expand...
Click to collapse
I have imei , and sim is working fine, as I tested my sim in another phone.

uktel3315 said:
I have imei , and sim is working fine, as I tested my sim in another phone.
Click to expand...
Click to collapse
I'm having the same problem, but with G900H. I have stock firmware, rooted and everything's working fine until suddenly, I have no network. I restart the phone and get network again but only for a couple of minutes.
Sent from my SM-G900H using XDA Free mobile app

Any update?

XanoZuke said:
Any update?
Click to expand...
Click to collapse
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.

uktel3315 said:
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.
Click to expand...
Click to collapse
Don't worry, I found out that the motherboard was water damaged (the irony of life....), so a bought an LG G3.
Regarding the Exynos chip, I'm never buying anything exynos ever again. The performance is not as solid as Snapdragon and it gets heated really fast. Still, thanks for your reply! ?
Sent from my LG-D855 using XDA Free mobile app

uktel3315
Click to expand...
Click to collapse
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite

edreab86 said:
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite
Click to expand...
Click to collapse
have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...

have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...
Sorry i end up selling the phone as is..

Same deal
My g900f has no mobile services sims fine

I have the same problem.
Cannot connect to network after flashing new ROM. Since then I tried about 10 different original roms and couple custom roms. Number of different MODEMs and BOOTLOADERs but with no joy. SIM card works fine in different phone.
Also I tried to load different CERT files and QCN with Z3X Box but that didn't help either.
I've tried *#0011# command here are results:
with LTE/WCDMA/GSM auto-connect:
imgur.com/i69HCBM
with WCDMA only:
imgur.com/QPbvKHG
and GSM only:
imgur.com/8InhQWQ
It seems that GSM is not working at all.
At this stage I run out of ideas and probably gonna get rid of the phone as it is or use it as pimped-out ipod touch
(sorry for messed up links but I can't post to outside sites yet)

Receiving "SIM card from unknown source" on unlocked S5??

hi all,
short story: Friend on T-Mobile needed a new phone. I bought them a Unlocked Americas S5 (SM-G900H) on amazon. They received it today. Swap sim cards from their damaged s4. Have them set it to global in network settings, have them change the ADN, and a couple other settings to get it to work on T-Mobile. Find out what was sent was a unlocked Verizon S5 model (SM-G900V) according to their system info screen. They also see Verizon apps installed and whatnot, and bootloader. Either way, they are able to receive data, text, calls. And they are getting 4GLTE just fine (shows and detcts it as tmobile, and they can download and browse the net, no issues), not HPSA+. Work like a charm as far as data and voice go.
However, only one issue.... they keep getting a "SIM Card is from a unknown source" warning on the taskbar that's just annoying. I had them root their phone, install supers, and install a root file browser after finding some information to freeze or remove "vzwphoneservice.apk" which seems to fix this same issues for others on older android phones. Problem is, its not there... not in system\app and not in system\priv-app where it should be. They use 4.4.2 kitkat. So I check my own note 3, which is also Verizon and has 4.4.2 kitkat. Im rooted, check same folders, that file is not in either of those directories.
To me, its apparent Verizon has changed the filename. Just trying to find out what it is so I can freeze or remove it to get rid of that Verizon "SIM Card from unknown source" warning.
Any suggestions or ideas? would be greatly appreciated

capta1ntr1ps said:
they keep getting a "SIM Card is from a unknown source" warning on the taskbar that's just annoying.
Click to expand...
Click to collapse
Confirm that both vzwphoneservice.apk and vzwphoneservice.odex are renamed or removed. You may also need to rename VzwController.apk and VzwController.odex and clear your phone cache (from recovery mode).
These are Verizon setup files and it is looking for an encrypted SIM that CDMA carriers like to use. The above should vanquish the message unless you have really rotten luck vis a viz Verizon having added yet another Kitkat setup package.
.

capta1ntr1ps said:
hi all,
short story: Friend on T-Mobile needed a new phone. I bought them a Unlocked Americas S5 (SM-G900H) on amazon. They received it today. Swap sim cards from their damaged s4. Have them set it to global in network settings, have them change the ADN, and a couple other settings to get it to work on T-Mobile. Find out what was sent was a unlocked Verizon S5 model (SM-G900V) according to their system info screen. They also see Verizon apps installed and whatnot, and bootloader. Either way, they are able to receive data, text, calls. And they are getting 4GLTE just fine (shows and detcts it as tmobile, and they can download and browse the net, no issues), not HPSA+. Work like a charm as far as data and voice go.
However, only one issue.... they keep getting a "SIM Card is from a unknown source" warning on the taskbar that's just annoying. I had them root their phone, install supers, and install a root file browser after finding some information to freeze or remove "vzwphoneservice.apk" which seems to fix this same issues for others on older android phones. Problem is, its not there... not in system\app and not in system\priv-app where it should be. They use 4.4.2 kitkat. So I check my own note 3, which is also Verizon and has 4.4.2 kitkat. Im rooted, check same folders, that file is not in either of those directories.
To me, its apparent Verizon has changed the filename. Just trying to find out what it is so I can freeze or remove it to get rid of that Verizon "SIM Card from unknown source" warning.
Any suggestions or ideas? would be greatly appreciated
Click to expand...
Click to collapse
did you ever figure this out ?

One post wonders. New members who solicit our help to solve their issue. But they don't have the courtesy to even let us know how the situation resolved. Perhaps it's an outright waste of time to try helping people with less than n posts.
.

fffft said:
One post wonders. New members who solicit our help to solve their issue. But they don't have the courtesy to even let us know how the situation resolved. Perhaps it's an outright waste of time to try helping people with less than n posts.
.
Click to expand...
Click to collapse
Hey guys, please don't feel that way. I am actually having the exact same issue, however I am unable to locate the files specified. Can you please direct me where to find these files? I will respond to let you know if it worked or not.
Thanks,
Ron

rwestbrookjr said:
I am actually having the exact same issue, however I am unable to locate the files specified. Can you please direct me where to find these files? I will respond to let you know if it worked or not.
Click to expand...
Click to collapse
Welcome to XDA.
It would be good if you started a new thread though, rather than hijack someone else's thread on a similar topic.
Tell us what you tried looking for (filenames, where.. using what app, etc. and what phone model you have.. as many details as you can) and lots of us will try to help you out.
.

fffft said:
Welcome to XDA.
It would be good if you started a new thread though, rather than hijack someone else's thread on a similar topic.
Tell us what you tried looking for (filenames, where.. using what app, etc. and what phone model you have.. as many details as you can) and lots of us will try to help you out.
.
Click to expand...
Click to collapse
Ok, I created a new thread here. Thank you for the quick reply!

Galaxy S7 Edge not registering on Network by all means

Before I post here I dit a lot of research and I get stuck in this point
The general problem was the imei and the serial number of my galaxy S7 Edge changed to something else after a root and a restore of firmware.I found here thanks to XDA forum the way to fix both of them.Now I have the correct imei,the correct serial number but when I insert a sim card I go on mobile networks and check for available networks and after I choose the correct one it says registered on Network but when I try to make a call or something on the dialer it says Not Registered on Network
I need to knom if there is anything else that needs to be done for the phone read and register the sim card.I still having the error of dm - verity failed so I flashed to bypass that.Beside that the phone is on stock rom with twrp and rooted.Please help me.Thanks for reading

monteiro75101 said:
Before I post here I dit a lot of research and I get stuck in this point
The general problem was the imei and the serial number of my galaxy S7 Edge changed to something else after a root and a restore of firmware.I found here thanks to XDA forum the way to fix both of them.Now I have the correct imei,the correct serial number but when I insert a sim card I go on mobile networks and check for available networks and after I choose the correct one it says registered on Network but when I try to make a call or something on the dialer it says Not Registered on Network
I need to knom if there is anything else that needs to be done for the phone read and register the sim card.I still having the error of dm - verity failed so I flashed to bypass that.Beside that the phone is on stock rom with twrp and rooted.Please help me.Thanks for reading
Click to expand...
Click to collapse
Yes i am duplicate problem rom flash not registered network after nandroid backup restore baseband fix after android 7 roms not work not registered network

hasanben35 said:
Yes i am duplicate problem rom flash not registered network after nandroid backup restore baseband fix after android 7 roms not work not registered network
Click to expand...
Click to collapse
Have you checked your APN.. ??
S7 Edge Powered by Echoe

Xode said:
Have you checked your APN.. ??
S7 Edge Powered by Echoe
Click to expand...
Click to collapse
The APN is set up and all settings are fine but still nothing.I dont have internet data on phone because i am not be able to register to lycamobile

Xode said:
Have you checked your APN.. ??
S7 Edge Powered by Echoe
Click to expand...
Click to collapse
Not work

F device Fd owerrite not vork two sim not work two imei

Same thing happened to me a few days ago. To solve the problem I flashed stock firmware, applied root using ODIN, and patch IMEI and certificates using Z3X Box. According to the guy who helped me with the Z3X, there's no way you can make the phone work again without patching IMEI and cert. When fixed, you won't be able to update nor factory reset the phone. If you do so, you'll have the same problem again. It's a matter of KNOX security on the S7 Edge.

zeth385 said:
Same thing happened to me a few days ago. To solve the problem I flashed stock firmware, applied root using ODIN, and patch IMEI and certificates using Z3X Box. According to the guy who helped me with the Z3X, there's no way you can make the phone work again without patching IMEI and cert. When fixed, you won't be able to update nor factory reset the phone. If you do so, you'll have the same problem again. It's a matter of KNOX security on the S7 Edge.
Click to expand...
Click to collapse
Hi Zeth...!
Can you explain why this happens and how to do the job in Z3X ?
I think I need at least version 24.8 (suppport for S7)... can you point where I can get it with no-card loader ? (I was unable to get it).
Thanks...!
Javier.

Well, as far as I know this issue happens because of the new security features on the phone. It has to do with the certificate written on the phone. Once you change it, it triggers an "alert" that is impossible to turn off, unless you patch it again. Unfortunately, according to some flashing sites, it can't be done over Nougat, hence your phone will remain on Marshmallow until a new method is found. I didn't do the flashing with Z3X. I payed a guy to make the process. I've been looking for a card-less Z3X but I only found an older version which doesn't support S7.

zeth385 said:
Well, as far as I know this issue happens because of the new security features on the phone. It has to do with the certificate written on the phone. Once you change it, it triggers an "alert" that is impossible to turn off, unless you patch it again. Unfortunately, according to some flashing sites, it can't be done over Nougat, hence your phone will remain on Marshmallow until a new method is found. I didn't do the flashing with Z3X. I payed a guy to make the process. I've been looking for a card-less Z3X but I only found an older version which doesn't support S7.
Click to expand...
Click to collapse
yes sir cert not work z3x box nougat stock after marsmallow cert and imei write z3xbox full work

not registered in network
I got a SM-G935FD model less than a month ago. Everything was going fine with performance and network. But 2 days ago i factory reset my phone to get rid of "the unauthorised action...." notification. The notification is still showing and also my network isn't working now...so i can't connect with internet now.....phone is unrooted. Should i update my marshmallow to naugat? or any tips...plz help......I AM VERY FRUSTRATED NOW.....HELP....HELP...

S7 with z3x box
Hi Guys , hope you all are well , I have the z3x box and I tried to fix it via upgrading to nougat 7.0 and only downgrading the modem to 6.0.1, and still no luck , I then tried to make a backup of my cert while on 6.0.1 and then upgrading to 7.0 and the restore the cert backup and still no luck , please let me know if there is any new discoveries.
Thank you in advance.

hello,is the problem solved? i had same problem too,im using s7 edge dual sim.my sim 2 slot work fine but on slot 1 cannot register on network..is Zx3 box truly solution?

It does patch the certificate! So yeah I recommend the z3x box , bought mine on aliexpress

ironman101 said:
It does patch the certificate! So yeah I recommend the z3x box , bought mine on aliexpress
Click to expand...
Click to collapse
thanks dude,will do that on this weekend..

i want to upgrade to android 7....
anyone have solution? how to patch certificate after upgrade if anyone have solution please reply

Eddyboy911 said:
i want to upgrade to android 7....
anyone have solution? how to patch certificate after upgrade if anyone have solution please reply
Click to expand...
Click to collapse
unfortunately no , im also looking for solution, was thinking of making a cert backup on 6.0.1 and then upgrading to 7.0 and restoring the cert , i have not tried it yet so i dont know the outcome

not registered on network
Even i have the same issue any solution for this yet

abdulshakoor02 said:
Even i have the same issue any solution for this yet
Click to expand...
Click to collapse
Unfortunately there is no solution to this issue yet but if you stay on 6.0.1 you can just use a cert patch and it works 100%, for android 7.0 we must just wait for an update from z3x
Sent from my SM-G930F using Tapatalk

ironman101 said:
Unfortunately there is no solution to this issue yet but if you stay on 6.0.1 you can just use a cert patch and it works 100%, for android 7.0 we must just wait for an update from z3x
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
But tgis should be resolved by samsung i dont have any issues its my phone with imei number amd everything same as on box but still this issue its not done and do i ahve to buy z3x box or can i get it fixed from someone thanks for your help bro anyways

S8 plus ussd problems, call forwarding

Hi first post here but not a complete newbie. But this time I'm stuck big time and would appreciate some help.
I've got a s8 plus that recently started playing up. All of a sudden it started not being able to make or receive calls. But I noticed it only happened when the "conditional call forwarding active" message didn't appear when dialing. I figured it had something to do with call forwarding so try to change the settings on supplementary services settings but when I tried to enter the settings an error message appeared "failed to read data" I tried sending the code manually to cancel voice mail *#022# to see if it would work but I got "connection problem or invalid mmi code" so assumed it could be that the phone is trying to check with the network the forwarding settings as the call starts but for some reason it cannot communicate with it as the mmi codes don't seem to working?? (I'm not that knowledgeable in that area) I tried all the fixes online for the "connection problem or invalid mmi" but none work so I flashed the firmware through Odin even tried a few different ones, I've been playing around with Odin for a while so I'm comfortable with it, I even flashed a pit once for a note 4 that was bricked (just saying so you can see I'm comfortable with using it, not an expert just comfortable) but nothing has fixed my problem my phone is a g955fd running pie and one UI with the latest security update. I've read the duos have some issues with this. I've tried other sim cards on my phone from different carriers and the problem is the same and I'm using my sim on a borrowed phone and no problems. I'm assuming the problem goes deeper than the firmware, could this problem be boot loader related? Would a nand erase and reinstalling the boot loader fix it? Everything else works 100%
Someone please help me, the phone I'm borrowing is an apple and every day I have it I feel weaker and dumber, it's like kryptonite.
Sorry for the long post but I've been browsing xda forums for years and I know that you guys always say to share as much info as possible. By the way I've searched and couldn't find a thread about this but it there is one I promptly apologize and just ask for the link to it if not thanks in advanced.

? G935F or G935U exynos vs snapdragon
Way for snapdragon
Flash https://forum.xda-developers.com/galaxy-s8+/development/rom-t3901074 with odin and test with hard factory reset recoery.
After, flash odin last firmware stock sammobile

Thanks
Thanks for your reply deadedge7
As I said my s8 + is a duos g955fd variant and has an Exynos processor, I'm not sure that rooting it would make much of a difference, as to my understanding rooting doesn't really change the boot loader it just allows you to install a custom recovery and roms. Which is not much different to reflashing a stock rom for all intents and purposes , but I might give it a try anyway. I guess that maybe a rom like the one in the thread you shared might give me some more hidden codes access as a root but I'm not sure. I will try to find a root like it for my variant unless you know of one and can point me to it.
Thanks

Hard reset or flash stock software or hardware problem
For iemi best way is root efs with flash twrp best way for /EFS
https://forum.xda-developers.com/android/general/guide-restore-imei-fix-corrupted-efs-t3116217 read only

Bellboy4510 said:
Thanks for your reply deadedge7
As I said my s8 + is a duos g955fd variant and has an Exynos processor, I'm not sure that rooting it would make much of a difference, as to my understanding rooting doesn't really change the boot loader it just allows you to install a custom recovery and roms. Which is not much different to reflashing a stock rom for all intents and purposes , but I might give it a try anyway. I guess that maybe a rom like the one in the thread you shared might give me some more hidden codes access as a root but I'm not sure. I will try to find a root like it for my variant unless you know of one and can point me to it.
Thanks
Click to expand...
Click to collapse
I am facing the same issue. Same variant. latest update April 1st Security Patch. Data and texting work. but can't make or receive calls. Have you found any solutions?

@unbreakabl3
I am facing the same issue. Same variant. latest update April 1st Security Patch. Data and texting work. but can't make or receive calls. Have you found any solutions?
Click to expand...
Click to collapse
No solution so far. I've rooted the phone and install a couple of custom ROMs but still nothing. I'll try and roll back the firmware and see what happens. I'm no expert but I still think it is fixable. If I find a solution I'll post it on this thread. If you find one please share. My solution at the moment is getting a galaxy A50, very comparable performance with the S8 and really cheap.

Bellboy4510 said:
@unbreakabl3
No solution so far. I've rooted the phone and install a couple of custom ROMs but still nothing. I'll try and roll back the firmware and see what happens. I'm no expert but I still think it is fixable. If I find a solution I'll post it on this thread. If you find one please share. My solution at the moment is getting a galaxy A50, very comparable performance with the S8 and really cheap.
Click to expand...
Click to collapse
I'll keep that in mind. Couple of things to note: I don't get the message conditional call forwarding active. I don't think I ever have.
I tried a different carrier SIM card(T-mobile) and it worked (I'm on At&t). I was able to make and receive calls. Even tried an out of country SIM card and received calls. But my At&t SIM works on other phones perfectly. Go figure lol.
The only other reason I can think of is maybe cos it fell a couple of times from the couch. About 1.5ft. New case kept making it slide off.

Install (Phone INFO SAM).apk
check csc if they are all the same operator

deadedge7 said:
Install (Phone INFO SAM).apk
check csc if they are all the same operator
Click to expand...
Click to collapse
Here is the screenshot from the app

unbreakabl3 said:
Here is the screenshot from the app
Click to expand...
Click to collapse
Original missing and DBT and XSG not same
It must be all same
flash stock firmware odin bl ap cp and csc
Install apk phone info sam
Check csc original and all same
After flashing firmware stock, *#243203855# to choose good csc reset and test

Signal lost G950F U5

Hi all! I hope you are well. I am new to the world of Samsung since I always chose Motorola, LG or Sony.
I wanted to ask you, what do I do to recover the signal from my Galaxy S8? Because I installed a Custom Rom, and it didn't raise a signal. I reinstalled the firmware (ARO), it is the one that corresponds to me, I rooted it with TWRP and Magisk, now ... I restored the backup I made with the old rom stock (the same) of EFS, which I understood, is which should have to do with the signal, IMEI, etc ... And I have no signal or data, but I see the application "My Personal" and says "Only emergency calls."
Thank you very much, any comments would be of great help and sorry for the inconvenience
I have the version of Android 9.0, it is Binary U5.

Hello, mate.
Well, i think the problem happend in just a little of us.
If you have signal of the carrier name, you need to have TOOLKID-SIM app for refresh Data Sim, the solution for me was.....
Go to Sim- toolkid>Roaming>option 1 or 2 ...
Sorry for my english.

ed-cheko said:
Hello, mate.
Well, i think the problem happend in just a little of us.
If you have signal of the carrier name, you need to have TOOLKID-SIM app for refresh Data Sim, the solution for me was.....
Go to Sim- toolkid>Roaming>option 1 or 2 ...
Sorry for my english.
Click to expand...
Click to collapse
Thanks mate for the answer, I tried what you suggested and it doesn't lift
I think it's weird because I get a voice message, "Emergency calls only"

Carrazangomezmartin said:
Thanks mate for the answer, I tried what you suggested and it doesn't lift
I think it's weird because I get a voice message, "Emergency calls only"
Click to expand...
Click to collapse
What Custom Rom are you using?

ed-cheko said:
What Custom Rom are you using?
Click to expand...
Click to collapse
I have tried Lineage OS 16 and Pixel Experience and nowhere can I pick up a signal, but unlike the original if it shows me "Personal" in the status bar, in the stock it says "Emergency calls only", I have the EFS folder in a backup, and in case of doubt also a Backup with the IMEI Tool application, but it didn't work for me to restore that, not even for the app. I have already run out of ideas, now I have the original one I had before with root and TWRP and I don't know what to do ?