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Samsung S7 model SM-930F "emergency calls only " after some usage period

Hello
I have this problem with my second samsung s7 black sm930F (SM-G930FZKAXEF) the phone works perfectly but after some 362 (*UPDATE NOW AFTER 162 HOURS )hours of function I get "emergency calls only " only phone restart or phone flight mode return to normal network mode and this bug is annoying because is a software problem ( tried everything replace nano sim several times no luck, turn data mobile off and on no luck either) the nano sim is perfectly inserted the phone works perfect but after that amount of hours when i pass areas with poor signal and go back to the ones with very good signal I have the latest update....
maybe you guys have the same problem
wait for update and fix

I had a similar problem on my rooted G930F after moving away from the initial stock rom that came with the phone. I found that the issue improved after using Odin to flash the May phone/CSC from Sanmobile then re-installing my current custom rom.

Ploody_Blone said:
I had a similar problem on my rooted G930F after moving away from the initial stock rom that came with the phone. I found that the issue improved after using Odin to flash the May phone/CSC from Sanmobile then re-installing my current custom rom.
Click to expand...
Click to collapse
i did not root my phone the software is original what came out of the box.....so you have a fix to this or should we wait from samsung....i did made a ticket to them hope they will fix

MirceaForce said:
i did not root my phone the software is original what came out of the box.....so you have a fix to this or should we wait from samsung....i did made a ticket to them hope they will fix
Click to expand...
Click to collapse
If you aren't familiar with Odin then maybe wait for an update from your operator, otherwise the other option is to find the corresponding rom at:
http://www.sammobile.com/firmwares/database/SM-G930F/ - then flash it with odin using one of the many Odin guides on the interwebs

Ploody_Blone said:
If you aren't familiar with Odin then maybe wait for an update from your operator, otherwise the other option is to find the corresponding rom at:
http://www.sammobile.com/firmwares/database/SM-G930F/ - then flash it with odin using one of the many Odin guides on the interwebs
Click to expand...
Click to collapse
my phone is not branded it's neverlocked only support from samsung....this is my second s7

Did u try a factory reset? I am assuming you using the phone with a sim card that is country specific. For example if I buy the phone from India then I need to use an Indian sim card for sometime and only then I can use another country sim card.
Sent from my SM-G930F using Tapatalk

mehtamitul said:
Did u try a factory reset? I am assuming you using the phone with a sim card that is country specific. For example if I buy the phone from India then I need to use an Indian sim card for sometime and only then I can use another country sim card.
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
the phone is french model sm930f neverlocked it's no difference because is european model so i'm in europe only in a different country......for ex I had a s6 sm920f french and use it in the same country that i'm using this s7 and was working perfectly.....your ex is like this if I want to use this european model in us,asia,russia, yes even in the manual it's say that you must first use it with a european sim an talk the first 5 min........
yes I did try a network reset today
I had the first s7 that was produce from my country and have the same issue..........
what is your up time ??? did you have this problem ???

Great. Rather than network reset try factory reset. If still does not work, take it to a service center they would reload the entire firmware without tripping knox.
Sent from my SM-G930F using Tapatalk

mehtamitul said:
Great. Rather than network reset try factory reset. If still does not work, take it to a service center they would reload the entire firmware without tripping knox.
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
what is your up time ??? did you have this problem in the past on your s7 ???

MirceaForce said:
what is your up time ??? did you have this problem in the past on your s7 ???
Click to expand...
Click to collapse
it's my second s7 with the same problem i don't think factory reset will solve this issue only samsung with an update......

I have never had.. however I do restart my phone once a week. 362 hours without restarting is really long on time.
Sent from my SM-G930F using Tapatalk

MirceaForce said:
it's my second s7 with the same problem i don't think factory reset will solve this issue only samsung with an update......
Click to expand...
Click to collapse
have you at least tried to factory reset? you can also flash with odin an unbranded software, i had a similar problem and factory reset solved it

maybe try replacing the sim

mehtamitul said:
I have never had.. however I do restart my phone once a week. 362 hours without restarting is really long on time.
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
on my old s6 1400 hours without any problems was a piece of cake so you will never had this problem with your phone if you restarted weekly........

oplix said:
maybe try replacing the sim
Click to expand...
Click to collapse
did this 3 times....and now I have called my network operator to verify if it's on their side.... but i don't think so.......

hauhauhau7 said:
have you at least tried to factory reset? you can also flash with odin an unbranded software, i had a similar problem and factory reset solved it
Click to expand...
Click to collapse
if the problem will occur again i will try this

To me this sounds like the device has been blocked or is a hardware issue. If you have not rooted or messed with the software on any way then it is the only explination .
Sent from my SM-G935F using Tapatalk

CuBz90 said:
To me this sounds like the device has been blocked or is a hardware issue. If you have not rooted or messed with the software on any way then it is the only explination .
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
it's my second new device so it cannot be a hardware it could be a software problem....what is your device up time and have you encountered this issue ?
i have reset network settings and wait to see if it will happen again I will do a full factory reset.... i have spoken with my network provider to verify this issue
on my oldest device samsung s6 even after 1400 hours this issue emergency call only never appeared
still wait to see if software updates will fix I cannot change my phone again it will be the third device

MirceaForce said:
it's my second new device so it cannot be a hardware it could be a software problem....what is your device up time and have you encountered this issue ?
i have reset network settings and wait to see if it will happen again I will do a full factory reset.... i have spoken with my network provider to verify this issue
on my oldest device samsung s6 even after 1400 hours this issue emergency call only never appeared
still wait to see if software updates will fix I cannot change my phone again it will be the third device
Click to expand...
Click to collapse
If you PM me your serial number and IMEI I will check the status of the device. If all is okay then I can proceed to look into ways of fixing it.
Sent from my SM-G935F using Tapatalk

CuBz90 said:
If you PM me your serial number and IMEI I will check the status of the device. If all is okay then I can proceed to look into ways of fixing it.
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
done

Screwed up my SM-G930VL, please help!!

Hi,
I bought a SM-G930VL (tracphone branded, but verizon compatible) galaxy s7 for a pretty good price, however the advanced and wifi calling were not options (even though verizon told me they were before I purchased). I decided I would try to flash the VZW firmware from sammobile through odin, but it did not work. It originally gave me the ext4 error, but then flashing the csc fixed that. I then flashed the AP file, but it finished very quickly (about 3.5 min) and now will only boot into recovery when powered up.
Is there anything I can do to save my phone, or have I permanently screwed it up?
Thanks

holy sh*t got it working. Flashed the BL, AP, CP, and CSC files and it booted to welcome screen!!
Thanks all (and hopefully this helps anyone in the future who runs into this predicament)
It is currently checking wifi connection so hopefully all is well!
Edit: Is there a way to edit the title? That way this could be maybe help the next person rather than getting ignored.

whatnow275 said:
holy sh*t got it working. Flashed the BL, AP, CP, and CSC files and it booted to welcome screen!!
Thanks all (and hopefully this helps anyone in the future who runs into this predicament)
It is currently checking wifi connection so hopefully all is well!
Edit: Is there a way to edit the title? That way this could be maybe help the next person rather than getting ignored.
Click to expand...
Click to collapse
Hi, want to ask a few questions. were you able to fully flash the Verizon firmware to this model with no issues? The phone is also supposed to be factory unlocked per my connections with reps.
Did the phone fully change to a SM-G930V, showing in settings and in Odin mode?

Yes I was able to fully flash Verizon and I have working wifi calling and advanced calling. In settings it shows up as V not VL as well. As far as I understand it is the exact same hardware just different software running on it
Sent from my iPhone using Tapatalk

whatnow275 said:
Yes I was able to fully flash Verizon and I have working wifi calling and advanced calling. In settings it shows up as V not VL as well. As far as I understand it is the exact same hardware just different software running on it
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Great, i flashed one yesterday for a friend via teamviewer and even changed the model as SM-G930V in odin mode. So I guess due to this the phone has now a locked bootloader and ended up being converted to a full Verizon galaxy S7. Only thing it did not take his Metro PCS sim card. Unsure it would take any other carrier sim cards.

aromerblz said:
Great, i flashed one yesterday for a friend via teamviewer and even changed the model as SM-G930V in odin mode. So I guess due to this the phone has now a locked bootloader and ended up being converted to a full Verizon galaxy S7. Only thing it did not take his Metro PCS sim card. Unsure it would take any other carrier sim cards.
Click to expand...
Click to collapse
Was the boot loader originally unlockable? I was under the impression that all SD versions were locked down right. That's great that you got it to work also!
Sent from my iPhone using Tapatalk

whatnow275 said:
Was the boot loader originally unlockable? I was under the impression that all SD versions were locked down right. That's great that you got it to work also!
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
It seems it was as it allowed me to flash the verizon bootloader and full firmware. Normally tracfones only allow to flash part of a firmware and rejects all bootloader partitions.

Is bootloader locked after flash g930v firmware. Or can I flash back to straight talk?

Cherb1990 said:
Is bootloader locked after flash g930v firmware. Or can I flash back to straight talk?
Click to expand...
Click to collapse
haven't tried flashing back as have no reason for that. To top it off the firmware has not been released yet.

aromerblz said:
haven't tried flashing back as have no reason for that. To top it off the firmware has not been released yet.
Click to expand...
Click to collapse
I'm currently on Verizon switching to T-Mobile this week. Is it possible to flash to G930T? I flashed g930VL to G930V. But wasnt sure if I could. If of the phone would be compatible with T-Mobile

Cherb1990 said:
I'm currently on Verizon switching to T-Mobile this week. Is it possible to flash to G930T? I flashed g930VL to G930V. But wasnt sure if I could. If of the phone would be compatible with T-Mobile
Click to expand...
Click to collapse
There were reports of someone flashing the phone to an SM-G930U (Unlocked US S7). So apparently they are interflashable. I however have not gone to that extent as am yet to get my one to thinker with. I flashed previously to a SM-G930V via teamviewer for a friend. You can search the threads and verify.
Read here:
http://forum.xda-developers.com/tmo...0t1-metro-pcs-flashed-g930t-firmware-t3358941

aromerblz said:
Great, i flashed one yesterday for a friend via teamviewer and even changed the model as SM-G930V in odin mode. So I guess due to this the phone has now a locked bootloader and ended up being converted to a full Verizon galaxy S7. Only thing it did not take his Metro PCS sim card. Unsure it would take any other carrier sim cards.
Click to expand...
Click to collapse
You probably figured it by now, but MetroPCS is the only retarded carrier that locks SIM to IMEI. So if you want to use MetroPCS on any other phone than the one you currently have it on, you need to call customer service and give them your new phone's IMEI. Then your new phone will start working. If you want to switch back to your old MetroPCS phone you need to call them again and give them that IMEI, which is retarded. I don't know why they do that but it's really annoying if you frequently switch phones.
I have a 935V (S7 Edge Verizon) and now have 935U ROM on it using Tracfone. Initially I have Tracfone's Verizon service but I wanted the freedom to easily move from one phone to another so I converted it to a Tracfone-GSM(ATT) and been using it in my Verizon S7 Edge (with 935U ROM) and iPhone SE without any problem.

whatnow275 said:
Hi,
I bought a SM-G930VL (tracphone branded, but verizon compatible) galaxy s7 for a pretty good price, however the advanced and wifi calling were not options (even though verizon told me they were before I purchased). I decided I would try to flash the VZW firmware from sammobile through odin, but it did not work. It originally gave me the ext4 error, but then flashing the csc fixed that. I then flashed the AP file, but it finished very quickly (about 3.5 min) and now will only boot into recovery when powered up.
Is there anything I can do to save my phone, or have I permanently screwed it up?
Thanks
Click to expand...
Click to collapse
Could you add links to everything you used? I have the same model using straight talk and I want to be able to have a backup firmware to flash in case I ever mess up my phone (which seems to be a trend). And have you had any issues at all? Like, does everything work okay?

whatnow275 said:
Hi,
I bought a SM-G930VL (tracphone branded, but verizon compatible) galaxy s7 for a pretty good price, however the advanced and wifi calling were not options (even though verizon told me they were before I purchased). I decided I would try to flash the VZW firmware from sammobile through odin, but it did not work. It originally gave me the ext4 error, but then flashing the csc fixed that. I then flashed the AP file, but it finished very quickly (about 3.5 min) and now will only boot into recovery when powered up.
Is there anything I can do to save my phone, or have I permanently screwed it up?
Thanks
Click to expand...
Click to collapse
I too would like to know if you could please provide links. Im rather new to this, the only other phone ive ever flashed rooted and put custom rom on was a Evo. But alls im looking to do is get my s7 rooted and it would be nice to have it flashed to Verizon first seeing as there root guide is for verison phone and firmware.

Dano5674 said:
I too would like to know if you could please provide links. Im rather new to this, the only other phone ive ever flashed rooted and put custom rom on was a Evo. But alls im looking to do is get my s7 rooted and it would be nice to have it flashed to Verizon first seeing as there root guide is for verison phone and firmware.
Click to expand...
Click to collapse
It's been a very long time but I'll try to remember lol. Been in iPhone land for about a year (now I'm back with the good guys tho )

Help lol
whatnow275 said:
It's been a very long time but I'll try to remember lol. Been in iPhone land for about a year (now I'm back with the good guys tho )
Click to expand...
Click to collapse
I bricked my SM-930VL too and it's not letting me flash anything back to stock. No clue what to do

Stumbled Upon TMO and Metro Unlocks Free

This is my first post... All I know about phones I've learned from this great website. I hope this is a chance to give back.
I've been playing with flashing either of these carrier firmwares on a few different Samsung phones. One being a production model the Galaxy On5. I do not know if this is an exploit or not... but this is what I did and the results of both.
SM-G550T - Galaxy On5 T-Mobile
T-Mobile Sim
I flashed SuperStarz Rom (Don't know how to link it)
His rom however is a Metro based rom..
I hit the device unlock app just for fun and to my shock it actually unlocked it. I've confirmed this with an AT&T sim card thus far. This model and account does not meet the criteria at all for the device unlock app stock to this phone.
Well I was curious..
SM-530T1 Galaxy Grand Prime
T-Mobile Sim
Tried stock unlock app... No success...
Flashed stock tmo firmware and tried again... it worked. Confirmed with a Wal-Mart family plan sim... and AT&T.
Please if anyone has the capability to try this and confirm it, let us know what happened.
Thank you!!
*I realize now this may be the wrong place to post this*
*UPDATE 4/3/17 - I performed a complete wipe and unroot on the On5... tried the unlock app for kicks... and it failed.
Because it was already unlocked!!!!*
Just did the same with the Grand Prime with the same result... seems as tho it might be legit. If someone else can confirm this I'll write a quick tut up for everyone. I also learned from my buddy that tried this after I explained what I was doing... he took the S4 Att and flashed tmo on it... and unlocked it. Flashed OG firm and remained unlocked. Or so he says... I will confirm later.

what unlocked it? the metropcs device unlock app?

Yes. And the Tmobile Unlock App on the other device.

Just tested with Galaxy Grand Express with success. Please... Anyone else confirm this??

Failing never felt so good!!! (On5)

So....
It seems to work well with later production models... Samsung Tmo Metro Att... and minutes ago with my Tmo sim, an older LG Boost phone.
Pls Anyone with any type of multi firmware capable phone, able to flash tmo or metro firms with the unlock app.. try this and let me know the results. I will be posting a full tut with screens in the AM.

I'm pretty sure I'm dying from H1N1 or Sars.... when I'm well enough to think I'll post tut.

metro galaxy grand prime unlock?
I have a MetroPCS Galaxy Grand Prime I'm trying to figure out how to unlock. I rooted it, flashed it with a paired down stock BUT I think that paired down stock got rid of the 'device unlock' app that was on my old Samsung Galaxy Core Prime because when I used that app on THAT phone it worked perfectly but I don't know how to unlock this phone or even if it IS locked (have no clue how to find out if it is). I ordered a global FreedomPop sim card to stick into this phone and give to my little girl (I want it for the tracking capabilities only for the most part, the rest I'm locking up).
This is the closest thread I can find about this subject. Any help would be deeply appreciated. I'm not a super genius for phones or programming but I can figure out how to get into the build and tinker if given the right instructions. I don't even know the mechanics of how phones are locked, though, so maybe that won't work. Again, not a super genius. Thanks, y'all.

Hi, i tried this today with a Galaxy on5 Tmobile (G550T) and didn't work. Had latest firmware installed, then installed twrp, backed up stock rom and installed Superstarz rom. MetroPCS device unlock app keeps saying 'Unlock Failed'.
Just reporting so others don't try in vain.

Yep, it's an oldie and moldie!?

AT&T Note 8 on T-Mobile

Upgraded to Note 9, want to pass my Note 8 on to a T-Mobile user. I want a complete T-Mobile experience, so all T-Mobile bloat and settings are needed (VoLTE, Hotspot, etc...) . Note 8 currently has latest CRID OTA from ATT. Looking for help in determining the correct way to proceed. I am having AT&T carrier unlock the device, so I would make this change after confirmed unlock. Also, once this is finished, will the device receive T-Mobile OTA updates?
I have read through https://forum.xda-developers.com/galaxy-note-8/how-to/guide-sm-n950u-u1-t3685884 but am confused. I see lots of mention of combination files, CSC changing, etc... that seem overkill for what i'm looking for.
Are these the steps I need to take?
1) Download latest Odin compatible TMB Firmware (which is what version?)
2) Download Odin on PC
3) Factory reset Note 8
4) Flash TMB firmware
5) Insert TMB SIM card
6) Success?

Yes just download this file
https://www.sammobile.com/firmwares/galaxy-note8/SM-N950U/TMB/download/N950USQU5CRIA/237765/
Flash everything with Odin and you will have a full 100% T-Mobile Note8 with all carrier features working
Sent from my SM-N950U1 using Tapatalk

Vish.N said:
Yes just download this file
https://www.sammobile.com/firmwares/galaxy-note8/SM-N950U/TMB/download/N950USQU5CRIA/237765/
Flash everything with Odin and you will have a full 100% T-Mobile Note8 with all carrier features working
Sent from my SM-N950U1 using Tapatalk
Click to expand...
Click to collapse
I saw here that simply flashing a different carrier firmware will not actually change carriers?? Is that correct?
https://forum.xda-developers.com/showpost.php?p=74087669&postcount=3
Someone in that thread said I would need to flash an unlocked U1 firmware and then the TMB firmware?

I am about to do this as well, switching from AT&T to T Mobile using my AT&T branded Note 8. I just wanted to confirm that it's as simple as downloading the latest Android Pie firmware for T Mobile and flash it to the AT&T branded phone? Any precaution like some other thread mentioned to flash the U1 (unlocked) firmware first then flash the T Mobile firmware?
Also, eventually, I will be giving this Note 8 to someone in China. At that point, is it better to flash the unlocked version of firmware or just leave the T Mobile firmware on it?
Thanks so much for your help.
Note: the phone is already unlocked.

I just wanted to let everyone know that I went and got T Mobile. After the new SIM card was inserted in my AT&T Note 8, after a reboot, it did something, a screen with a SIM car graphics and some moving dot. Then it rebooted itself again, and then T Mobile splash screen showed up. It even added the bloatware from T Mobile. So, Android 9 for Note 8 probably has both ROMs? I also checked the firmware version. It shows the latest T Mobile ROM.
I didn't have to do anything other than just inserting the new SIM card from T Mobile.
This is very interesting to me, and the store guy couldn't believe his eyes either.

de2000 said:
I just wanted to let everyone know that I went and got T Mobile. After the new SIM card was inserted in my AT&T Note 8, after a reboot, it did something, a screen with a SIM car graphics and some moving dot. Then it rebooted itself again, and then T Mobile splash screen showed up. It even added the bloatware from T Mobile. So, Android 9 for Note 8 probably has both ROMs? I also checked the firmware version. It shows the latest T Mobile ROM.
I didn't have to do anything other than just inserting the new SIM card from T Mobile.
This is very interesting to me, and the store guy couldn't believe his eyes either.
Click to expand...
Click to collapse
And i was wondering why my phone still showing at&t bloatware even after installing the Verizon firmware. ? Now i understand Cuz I'm using at&t sim. Good to know?

Another update!
I just got updated by T-Mobile to the latest firmware after converting over as previously stated. I have to say that the update page on the phone for the T-Mobile firmware is MUCH nicer and informative than the ATT version. It tells you how much time left, the version numbers, and even a "what's new" section...
After this update, my phone is actually better at battery usage.

Question Samsung S21 VZN need unlocked or converted to ATT. Tried odin.. Maybe I am an idiot.

Hello.
Got a free phone from a buddy S21 5G. I am wanting to swap it for the S10* 1tb I gave my wife to use it was a bit expensive. So I'd rather ti go back in the box.
Popped the sim in it, it works makes calls sometimes, sometimes not. Texts seem to always work, I am currently on ATT I would prefer to have that firmware as I live in the stick with ho cell service. ATT has wifi calling which is pretty much a necessity here.
So what exactly do I need to do to get this off the VZN fir

Hello. Could you all provide me the links for what I need? Found a link that had a patched Odin plus the firmware. I installed in booted how I was suppose to. Tried to install in and it errored out. Also. I do not know what file to select for the user data selection, I do not mind deleting all data as it 8s hacked up and can put ti back with smart switch.

Hello, did you manage to flash the phone?, I'm stuck with a similar case, mine is a factory unlocked unit from Verizon, it turns out that even if it is factory unlocked, is locked after a few minutes by verizon, I have tried everything to get rid of the VZW firmware but it seems that Verizon locks the bootloader so I can't flash it (it passes om odin and everything but the firmware doesn't change)
I even paid SamKEY credits to change the CSC but it didn't change either.

tylerdustin2008 said:
Hello. Could you all provide me the links for what I need? Found a link that had a patched Odin plus the firmware. I installed in booted how I was suppose to. Tried to install in and it errored out. Also. I do not know what file to select for the user data selection, I do not mind deleting all data as it 8s hacked up and can put ti back with smart switch.
Click to expand...
Click to collapse
Did you ever get your issue fixed?

can anyone suggest to me whether moving from Apple to Samsung is a good option or not? pc games