I got a new phone, the LM-G820UM AT&T version. I followed this guide: https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/ to flash the stock firmware. With my SIM card in it says "network locked", it doesn't prompt for the unlock code. I have the unlock code and I've tried the various unlock commands (2945#*71001# and 2945#*20001#), but nothing comes up when I do these. Do I need to get it back to the AT&T firmware to be able to unlock it? If so, how can I do this?
gunnerone007 said:
I got a new phone, the LM-G820UM AT&T version. I followed this guide: https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/ to flash the stock firmware. With my SIM card in it says "network locked", it doesn't prompt for the unlock code. I have the unlock code and I've tried the various unlock commands (2945#*71001# and 2945#*20001#), but nothing comes up when I do these. Do I need to get it back to the AT&T firmware to be able to unlock it? If so, how can I do this?
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wow, yeah, that's unfortunate. First, yes, it's the at&t firmware that the unlock code works with, not any other firmware.
second, at&t doesn't make their kdz available, so you have no easy way to get back to their firmware.
you might get lucky and find someone who has backed up all their partitions from at&t. Then u would flash ea one back via qfil.
Important lesson: don't buy a locked phone. if u get a locked phone, don't to anything to the firmware until u unlock the phone.
cheers
@AsItLies would this phone work in it's current state with AT&T?
gunnerone007 said:
@AsItLies would this phone work in it's current state with AT&T?
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To the best of my knowledge, no. At&t is one of the carriers that has restrictions for their networks. Last I read (have never used them personally), they only allow phones that have their IMEI (they check that), and it's using their ROM, to access volte and vowifi.
so, would it work? yes and no. Volte and Vowifi may or may not be important to you.
Additionally, I'm absolutely no expert with at&t, so u might just try and find out, my info could be outdated.
Related
Hio, I have a TMOB TP2. its a locked device but I have succesfully HARD SPL's, and flashed new ROMSs.
I need to unlock the device now. I got the unlock code from TMOB but when I put in a 'foreign' SIM, NOTHING HAPPENS. I dont get the 'your device is locked' etc. I simply get no signal.
Can anyone advise?
ekerbuddyeker said:
Hio, I have a TMOB TP2. its a locked device but I have succesfully HARD SPL's, and flashed new ROMSs.
I need to unlock the device now. I got the unlock code from TMOB but when I put in a 'foreign' SIM, NOTHING HAPPENS. I dont get the 'your device is locked' etc. I simply get no signal.
Can anyone advise?
Click to expand...
Click to collapse
there is a sim unlocker floating around here somewhere.
I believe you must be on the T-Mobile ROM in order to get the Foreign SIM dialogue. Flash back to the T-Mobile ROM and try again, then flash back to your desired ROM once you're unlocked. Otherwise, you can use the OliNex SIM unlocker
DaveTheTytnIIGuy said:
I believe you must be on the T-Mobile ROM in order to get the Foreign SIM dialogue. Flash back to the T-Mobile ROM and try again, then flash back to your desired ROM once you're unlocked. Otherwise, you can use the OliNex SIM unlocker
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Click to collapse
so flash a TMOB rom first? Cant see why that would make a differemce.
Can you limk me to the unlocker?
ekerbuddyeker said:
so flash a TMOB rom first? Cant see why that would make a differemce.
Can you limk me to the unlocker?
Click to expand...
Click to collapse
I meant that you need to insert the SIM while your Rhodium is using the T-Mobile ROM, not to flash the T-Mobile ROM and then immediately flash to another ROM and try again. But anyway, here's a link to the unlocker, and instructions on how to obtain it from Olipro.
Hello All,
I got a t-mobile s4 from USA which was paid in full and never activated on any network in USA. I am now trying to use an Airtel Sim Card in India and it shows that its SIM Unlocked. On contacting the T-Mobile support they are saying that they cant provide an unlock code because the device was never activated on their network.
I am stuck because all websites providing unlock codes work on the same precondition that the device was earlier activated in a T-Mobile network. I am also not able to get into service mode and apply the sim unlocking fix as suggested in few posts.
Please provide help and suggest me the options. I am not afraid to shell some more bucks to make it work but i need assurity that the method would work.
Is there a way that i can try which doesnt require t-mobile network at all???
My android version is 4.4.2 and device has been rooted now.
To use service mode to unlock, you need to flash MDL modem first. After unlocking, you should be able to flash the latest modem back retaining the lock.
Have you checked if the region lock away app works?
This thread has some info http://forum.xda-developers.com/showthread.php?t=2654058
Sent from my SAMSUNG-SGH-I337 using Tapatalk
jmjoyas said:
To use service mode to unlock, you need to flash MDL modem first. After unlocking, you should be able to flash the latest modem back retaining the lock.
Have you checked if the region lock away app works?
This thread has some info http://forum.xda-developers.com/showthread.php?t=2654058
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Click to expand...
Click to collapse
Regionlockaway apps doesnt work...I am outside USA having no access to the T-Mobile network and was wondering whether the steps suggested by you will allow me to unlock the device from service mode despite having no cellular service?
gargyagotra said:
Regionlockaway apps doesnt work...I am outside USA having no access to the T-Mobile network and was wondering whether the steps suggested by you will allow me to unlock the device from service mode despite having no cellular service?
Click to expand...
Click to collapse
As far as I know, the service mode unlock disables the carrier check and doesnt require cellular service.
Also, the S4s are also region locked. They get region unlocked when activated and used on the carrier network. So, your phone requires both the sim and region unlock.
jmjoyas said:
As far as I know, the service mode unlock disables the carrier check and doesnt require cellular service.
Also, the S4s are also region locked. They get region unlocked when activated and used on the carrier network. So, your phone requires both the sim and region unlock.
Click to expand...
Click to collapse
Thanks for your response. I am a newbie so just confirming the steps that i need to take to unlock the device:-
a) SInce i am on 4.4.2 with baseband as M919UVUF9B4 i would need to downgrade it to 4.2 stock version using the link you have recommended above.
b) Once i am on the 4.2 version i can then flash MDL modem to sim unlock
c) Then use region lock away tool to region unlock.
d) Upgrade it again to 4.4.2 and use my device freely.
Let me know if i got it right
gargyagotra said:
Thanks for your response. I am a newbie so just confirming the steps that i need to take to unlock the device:-
a) SInce i am on 4.4.2 with baseband as M919UVUF9B4 i would need to downgrade it to 4.2 stock version using the link you have recommended above.
b) Once i am on the 4.2 version i can then flash MDL modem to sim unlock
c) Then use region lock away tool to region unlock.
d) Upgrade it again to 4.4.2 and use my device freely.
Let me know if i got it right
Click to expand...
Click to collapse
For the service menu to work, all you need is the MDL modem. You do not need to downgrade everything. You should be able to find a way to flash the modem alone.
jmjoyas said:
For the service menu to work, all you need is the MDL modem. You do not need to downgrade everything. You should be able to find a way to flash the modem alone.
Click to expand...
Click to collapse
Thanks for confirming. However, i am unable to find any thread tutorial which talks about flashing NB4 modem back to MDL on NB4 bootloader. Most of the threads talk about flashing modems which are prior to 4.3 and doesnt serve my purpose as in am on the latest bootloader.
Please help in providing any thread link or steps to perform the flashing.
Thanks Again!
I have a Canadian Bell S3 i747m which broke and I got some random guy to fix it for me. He frustratingly ended up installing a ROGERS circuit board(or so he says) without bothering to check the fact my phone was loaded with Bell bloatware or just asking me my carrier.
I now need to unlock the SIM in order to use it properly and I just want to be sure I have the correct information and I don't end up paying for an unlock code that will not work since I didn't provide the proper carrier.
My SIM card (not sure if that matters): BELL
My board/IMEI: ROGERS (Apparently)
I wanted to determine which carrier I was tied to but I see 0 bloatware in my phone which makes me think the guy is wrong/lying and it's not actually a Rogers board. Is there another way to determine which carrier my phone is tied to?
Cyclone112 said:
I have a Canadian Bell S3 i747m which broke and I got some random guy to fix it for me. He frustratingly ended up installing a ROGERS circuit board(or so he says) without bothering to check the fact my phone was loaded with Bell bloatware or just asking me my carrier.
I now need to unlock the SIM in order to use it properly and I just want to be sure I have the correct information and I don't end up paying for an unlock code that will not work since I didn't provide the proper carrier.
My SIM card (not sure if that matters): BELL
My board/IMEI: ROGERS (Apparently)
I wanted to determine which carrier I was tied to but I see 0 bloatware in my phone which makes me think the guy is wrong/lying and it's not actually a Rogers board. Is there another way to determine which carrier my phone is tied to?
Click to expand...
Click to collapse
The carrier doesn't matter. Once unlocked, it's unlocked for every carrier (unless it's unlocked by code).
You could go check the APN to see which carrier it's from.
BWolf56 said:
The carrier doesn't matter. Once unlocked, it's unlocked for every carrier (unless it's unlocked by code).
Click to expand...
Click to collapse
Oh really? I was looking at the gsmliberty site for unlocking and it asks for a carrier. I can't post the link since I'm a new account but here it is split:
gsmliberty(dot)net/shop/samsung-galaxy-s3-unlock-codes-p-3528.html
I then went into their Terms of Service and it specifies that if I provide an incorrect carrier and the unlock code doesn't work then I won't get a refund. Does this mean this site is BS and I should avoid it and find another?
EDIT: Oh I see you added info about checking the APN. Don't know what that is but I'll Google it. Assuming I find it should I still avoid gsmliberty or should I give them a shot?
BWolf56 said:
The carrier doesn't matter. Once unlocked, it's unlocked for every carrier (unless it's unlocked by code).
You could go check the APN to see which carrier it's from.
Click to expand...
Click to collapse
I went to Settings > Connections > More networks > Mobile Networks and it tells me this: Insert SIM card to access network services
EDIT: Ok I finally found the AP and CSC by dialing *#1234# and then comparing it to sammobiles firmware to find out which carrier it is tied to. Still worried about the fact I get the SIM error above but hopefully that will go away when I attempt to unlock it
Cyclone112 said:
I went to Settings > Connections > More networks > Mobile Networks and it tells me this: Insert SIM card to access network services
EDIT: Maybe I'm looking at the wrong spot. Here is my phone's about in case that helps:
View attachment 2807396
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Click to collapse
Umm I though you'd have access to it w/o a sim card.
I'm not sure how else you could determine which carrier the motherboard is locked to.
BWolf56 said:
Umm I though you'd have access to it w/o a sim card.
I'm not sure how else you could determine which carrier the motherboard is locked to.
Click to expand...
Click to collapse
I just ended up editing my last post a minute before you posted this. I did determine the carrier and it is in fact Rogers. I was planning on just getting an unlock code through a website. You mentioned that means it will only be unlocked for them which I'm fine with but I'm just concerned about the fact I have a Bell SIM. Will that cause any problems with the unlock process or future dealings with BELL?
Actually I have a better question. Can I just put Bell's firmware on my phone instead of Rogers using Odin and then get an unlock for Bell and theoretically I'll be back to where I was?
What bootloader is on the phone? If you have the 4.3 bootloader, you'll have to buy an unlock code. If you have the 4.1.1 bootloader and you are running a stock ROM (doesn't matter about the carrier), you can use the free method to unlock it. If you have the 4.1.2 bootloader, downgrade to the Rogers 4.1.1 ROM and unlock it using the free method.
audit13 said:
What bootloader is on the phone? If you have the 4.3 bootloader, you'll have to buy an unlock code. If you have the 4.1.1 bootloader and you are running a stock ROM (doesn't matter about the carrier), you can use the free method to unlock it. If you have the 4.1.2 bootloader, downgrade to the Rogers 4.1.1 ROM and unlock it using the free method.
Click to expand...
Click to collapse
I'm running 4.3 so I know I need an unlock code unfortunately. I have a Bell SIM card but have Rogers firmware. The site I was looking to buy an unlock code from asks for my carrier so I presume I need to use Rogers. Will that be fine or am I able to just throw Bell firmware on my phone and buy an unlock code specifying Bell as my carrier?
I am not sure of you can load the stock Bell firmware and change the phone so it is locked to Bell. If this were the case, owners could switch carriers by flashing different firmware.
Cyclone112 said:
I just ended up editing my last post a minute before you posted this. I did determine the carrier and it is in fact Rogers. I was planning on just getting an unlock code through a website. You mentioned that means it will only be unlocked for them which I'm fine with but I'm just concerned about the fact I have a Bell SIM. Will that cause any problems with the unlock process or future dealings with BELL?
Actually I have a better question. Can I just put Bell's firmware on my phone instead of Rogers using Odin and then get an unlock for Bell and theoretically I'll be back to where I was?
Click to expand...
Click to collapse
Unlocking is permanent and unlocks to every carrier. Knowing which one you're locked to only matters to get a unlock code, after that, it's free for all.
BWolf56 said:
Unlocking is permanent and unlocks to every carrier. Knowing which one you're locked to only matters to get a unlock code, after that, it's free for all.
Click to expand...
Click to collapse
Gotcha, so there's no point in flashing Bell firmware at all. I just need the correct one for getting an unlock code in the first place. Thanks for helping a noob out.
I recently purchased an unlock code from a company online. I finally received my code tonight but I'm unsure how to go about using it to unlock the device. The Device Unlock application wouldn't allow me to enter anything, so I dialed #7465625*638*# and entered the code that way. I followed a few trouble shooting techniques but it still won't work on AT&T. Does anyone have any experience with this using this device? If so, I'd love to hear what to do.
Try flashing a different Rom from another carrier through recovery. Maybe the AT&T rom. I simply put a tmobile sim in the phone and it successfully my phone through the application.
Z51 said:
Try flashing a different Rom from another carrier through recovery. Maybe the AT&T rom. I simply put a tmobile sim in the phone and it successfully my phone through the application.
Click to expand...
Click to collapse
Youre saying to flash the stock rom from AT&T? Have you done this? What do you mean you put a TMobile SIM in and it unlocked it..
1. Did you have a TMobile S6?
2. Did you flash an ATT rom to it? Custom recovery or stock?
3. Did you use a code?
I purchased an att gs9+ directly from samsung, after that, I installed the unlocked firmware. Up to this point, I have used an att sim. When I tried to use a tmobile sim recently, I got a message saying "Invalid SIM card inserted - This SIM card is not supported. I was surprised as I thought it was unlocked since I installed the firmware. I then tried to install a version of the ATT firmare thinking I perhaps still needed to unlock it? At any rate, I tried but ODIN gave me the following error: FAIL!(auth).
So, first question is - If I installed unlocked firmware on my att gs9+, is it truly unlocked?
Second question, can I install the att version back again? Or perhaps the tmobile?
Finally - what does the ODIN error mean?
Thanks for taking the time to read,
Ben
benjiesell said:
I purchased an att gs9+ directly from samsung, after that, I installed the unlocked firmware. Up to this point, I have used an att sim. When I tried to use a tmobile sim recently, I got a message saying "Invalid SIM card inserted - This SIM card is not supported. I was surprised as I thought it was unlocked since I installed the firmware. I then tried to install a version of the ATT firmare thinking I perhaps still needed to unlock it? At any rate, I tried but ODIN gave me the following error: FAIL!(auth).
So, first question is - If I installed unlocked firmware on my att gs9+, is it truly unlocked?
Second question, can I install the att version back again? Or perhaps the tmobile?
Finally - what does the ODIN error mean?
Thanks for taking the time to read,
Ben
Click to expand...
Click to collapse
SIM unlock is a completely separate thing which you'd need to use an unlocking service for, nothing to do with the firmware
Check the bootloader version your phone is running now, vs the one you're trying to flash, you cannot downgrade the BL
Download mode will show BL:1 or BL:2)
Firmware shows it here
G960FXXU2BRGA
Flash an equal or higher BL
*Detection* said:
SIM unlock is a completely separate thing which you'd need to use an unlocking service for, nothing to do with the firmware
Check the bootloader version your phone is running now, vs the one you're trying to flash, you cannot downgrade the BL
Download mode will show BL:1 or BL:2)
Firmware shows it here
G960FXXU2BRGA
Flash an equal or higher BL
Click to expand...
Click to collapse
Ok, thanks for the response.
I can see that my bootloader version is 3. I dont see any ATT versions out there for 3 though. Am I correct in thinking that I would need an ATT firmware to even get the sim card unlock prompt? Thats really the issue for me.. I am unable to unlock the device despite trying to reinsert, and running those #XXX*# codes.
benjiesell said:
Ok, thanks for the response.
I can see that my bootloader version is 3. I dont see any ATT versions out there for 3 though. Am I correct in thinking that I would need an ATT firmware to even get the sim card unlock prompt? Thats really the issue for me.. I am unable to unlock the device despite trying to reinsert, and running those #XXX*# codes.
Click to expand...
Click to collapse
nvm...Im not sure if by dumb luck, or putting on several firmwares and clearing things out.. it finally prompted me. wtf...
Thanks for the advice. I learned a few things about the firmware.
benjiesell said:
nvm...Im not sure if by dumb luck, or putting on several firmwares and clearing things out.. it finally prompted me. wtf...
Thanks for the advice. I learned a few things about the firmware.
Click to expand...
Click to collapse
Good stuff :good: