Database Develop

Carrier unlock a G920T permanently

Hi guys,
I need some clarification re: carrier unlocking and how it works. I recently purchased a carrier unlocked G920T, and I was going to start messing with custom roms/kernels and other goodies. My question is: Will the phone revert back to being locked if I do a factory reset or if I unlock the bootloader and flash custom roms?
I'm not a T-Mobile user, so I can't get another unlock code from them.
Thanks!!

The G920T has a carrier unlocked version, which is probably the one you have, not the T-Mobile one. Even if it is, usually a carrier unlocked device will remain unlocked forever unless it was unlocked using a different or hacky method, then there is a possibility that it will relock
Sent from my SM-G920T using Tapatalk

Yeahh go ahead, mess with it. when it is carrier unlocked, the software doesn't affect it, unless it is a hacky method like @serio22 said, but there isnt such hacky method for the GS6 so have fun.

If it is a G920T (the T means it's from T-Mobile), then carrier unlocking is not a guaranteed state. I paid T-Mobile the full price to get my GS6 and they "permanently" unlocked it. Then after a OTA software patch all of a sudden it locked itself again and I couldn't use my phone for 2 days while they tried to unlock it. T-Mobile's new device unlocking uses a new system which has the phone "phone home" to their servers to check if you're allowed to use it outside of their network. It happened again when I accepted the Android 5.1.1 OTA. So...beware of T-Mobile's not-very-permanent permanent carrier unlocking.

I am living in india..
My relatives brought me the t model ( i wanted f model instead of i sold in india for quicker updates but got t model...lol )
Anyways,
The moment i inserted my sim, it worked like a charm so its unlocked at the moment.
I dont know how they made payment their or how it was unlocked, but the way used must be legit coz its still stock at the moment without root / recovery etc. .
I read humo saying it can get locked again...
My main question, what are the odds of that happening?
Also since i live in india, i wont be able to contact t mobile via phone/walk in, are there ways i can get it unlocked again?
I dont have the bill too if it matters

i believe they have an app that unlock ur device since that is how i unlocked mine. if not u can try to contact customer service online since u r not in US.

With device unlock app , will i have to pay for unlock my s6 g920t or it'll unlock my device for free.
I have an unlocked s6 tmobile from usa, i heard the flashing stock rom will relock the device.
If the phone will relock then how can i unlock it again?

I'm not sure about flashing a stock ROM relocking the device. Mine re-locked when T-Mobile sent Android security patches. This week I did the Android 6.0 OTA update and it has remained unlocked.

Hey guys! i have a factory unlocked version of s6 tmobile, my question is if i can flash the tmobile MM firmware . My model says "country: cellular south" and the firmware country says us tmobile, so i dont know if i can flash without any problems, (Sorry for my english it sucks) thanks !

polipol15 said:
Hey guys! i have a factory unlocked version of s6 tmobile, my question is if i can flash the tmobile MM firmware . My model says "country: cellular south" and the firmware country says us tmobile, so i dont know if i can flash without any problems, (Sorry for my english it sucks) thanks !
Click to expand...
Click to collapse
Polio, i have the same phone and i flashed MM without any problems. Check out the q&a section here and theres a recent thread that talks about how to that refers to a reddit post
Sent from my SM-G920T using XDA-Developers mobile app

bitbank said:
If it is a G920T (the T means it's from T-Mobile), then carrier unlocking is not a guaranteed state. I paid T-Mobile the full price to get my GS6 and they "permanently" unlocked it. Then after a OTA software patch all of a sudden it locked itself again and I couldn't use my phone for 2 days while they tried to unlock it. T-Mobile's new device unlocking uses a new system which has the phone "phone home" to their servers to check if you're allowed to use it outside of their network. It happened again when I accepted the Android 5.1.1 OTA. So...beware of T-Mobile's not-very-permanent permanent carrier unlocking.
Click to expand...
Click to collapse
How did you solve this? My phone stopped working flashed newest (G920TUES5DPK1_G920TXAR5DPK1_G920TUES5DPK1_HOME.tar.rar) and i can't go to older version as that gives me ;
Code:
SW REV. CHECK FAIL DEVICE: 5 BINARY: 3

Christiaanjadieja said:
How did you solve this? My phone stopped working flashed newest (G920TUES5DPK1_G920TXAR5DPK1_G920TUES5DPK1_HOME.tar.rar) and i can't go to older version as that gives me ;
Code:
SW REV. CHECK FAIL DEVICE: 5 BINARY: 3
Click to expand...
Click to collapse
You can't downgrade your bootloader so you'd have to pay to unlock it unfortunately

crixley said:
You can't downgrade your bootloader so you'd have to pay to unlock it unfortunately
Click to expand...
Click to collapse
Got it done remotely!

I have a Galaxy S6 (SM-G920T) from T-Mobile. It was locked. But it has an "Unlock" app installed by default. I used it and phone was instantly unlocked! Fast, easy and free!

I used to live in the US for a year and bought a g920T. Since i had the requirements i Unlocked and came back to my country but because of a problem, I had to install a stock firmware and now the unlock is gone.
So i'm wondering, if someone with a unlocked phone made firmware backup, remove the IMEI, and send it online would it work? I mean, right now it works just fine, so i can backup my IMEI and ID and just restore it if needed.

Please help
danveer said:
I am living in india..
My relatives brought me the t model ( i wanted f model instead of i sold in india for quicker updates but got t model...lol )
Anyways,
The moment i inserted my sim, it worked like a charm so its unlocked at the moment.
I dont know how they made payment their or how it was unlocked, but the way used must be legit coz its still stock at the moment without root / recovery etc. .
I read humo saying it can get locked again...
My main question, what are the odds of that happening?
Also since i live in india, i wont be able to contact t mobile via phone/walk in, are there ways i can get it unlocked again?
I dont have the bill too if it matters
Click to expand...
Click to collapse
I am in same scenario as you are/were,I am also having s6 (Tmobile) please tell me did flashing relocked your device?

So far no
I have flashed recovery - custom rom - kernel
Messed up sometimes so even went back to stock using odin then flashed everything again
Its still unkocked

Hello! I've bought my S6 (SM-G920T) as carrier unlocked but when my pcb has burned due to factory fault and sent my phone to Samsung they gave me again it was locked. I'm from Argentina and I haven't T-Mobile sim to unlock with default application. I've called to my carrier in Argentina and they said me the IMEI it's unlocked but my phone still sais it's network blocked... Can anybody help me?

vita_lp said:
Hello! I've bought my S6 (SM-G920T) as carrier unlocked but when my pcb has burned due to factory fault and sent my phone to Samsung they gave me again it was locked. I'm from Argentina and I haven't T-Mobile sim to unlock with default application. I've called to my carrier in Argentina and they said me the IMEI it's unlocked but my phone still sais it's network blocked... Can anybody help me?
Click to expand...
Click to collapse
Have you tried with the tmobile device unloced app.? If that doesnt work then head over to this awesome guy, he can help you unlock it remotely. https://forum.xda-developers.com/tmobile-galaxy-s6/general/sim-unlock-honestly-free-t3601740

Using An AT& T Handset IN UK

Can this be done?
Does it work on all 4G bands.
Better still can it be flashed with a firmware to get rid of anything to do AT&T?
Ta

Been awhile since I posted this.
Can anyone tell me if it's possible to flash say a Cambodian ROM on an AT&T Note 5?

@home said:
Been awhile since I posted this.
Can anyone tell me if it's possible to flash say a Cambodian ROM on an AT&T Note 5?
Click to expand...
Click to collapse
no idea. i believe i have an at&t note 5 based on what i've discovered after googling my bootloader / pda / csc / baseload version codes, although there's nothing on my hardware/software to suggest anything at&t related. whatever has been done to it means it's working ok for calls and data (except it always says '4g' in the notification bar, even when i'm in an area without 4g!)
I'm trying to find whether i can upgrade to MM (or Nougat when available) without destroying my phone

Does your note 5 have at&t branding on the back?
When you go in sotfware info what rom have you got?
have you ever had any ota updates?
what sim card are you using?
Thanks

@home said:
Does your note 5 have at&t branding on the back?
When you go in sotfware info what rom have you got?
have you ever had any ota updates?
what sim card are you using?
Thanks
Click to expand...
Click to collapse
Only got it about 2 weeks ago from HK via ebay. No reason to suspect anything until looking at updating to MM. My model type in 'about device' shows as SM-N920F which, after some searching around, doesn't exist. Then unearthed the phone is rooted and possibly from USA via a China unlock process etc etc. Anyway, in answer to your questions:
1. No AT&T logo
2. Software looks stock (i.e. no names that would suggest custom rom)
3. No OTA updates (but then I'm rooted so wouldn't expect any - I believe)
4. 3 (three)

dmlargo said:
Only got it about 2 weeks ago from HK via ebay. No reason to suspect anything until looking at updating to MM. My model type in 'about device' shows as SM-N920F which, after some searching around, doesn't exist. Then unearthed the phone is rooted and possibly from USA via a China unlock process etc etc. Anyway, in answer to your questions:
1. No AT&T logo
2. Software looks stock (i.e. no names that would suggest custom rom)
3. No OTA updates (but then I'm rooted so wouldn't expect any - I believe)
4. 3 (three)
Click to expand...
Click to collapse
Thanks for the reply.
I was looking on ebay at a 64gb but they all seem to be at&t refurbished. Whatever that means.
I was told an at&t wont update with their sim being in the phone. That's why I asked about yours.
Do you have a link to the one you got?
Ta

@home said:
Thanks for the reply.
I was looking on ebay at a 64gb but they all seem to be at&t refurbished. Whatever that means.
I was told an at&t wont update with their sim being in the phone. That's why I asked about yours.
Do you have a link to the one you got?
Ta
Click to expand...
Click to collapse
http://www.ebay.co.uk/itm/282225921054

Convert Verizon Note 9 to AT&T Note 9

Is it possible to convert via firmware update a Verizon sim unlocked N960U to fully branded AT&T N960U to get wifi calling and all the other branded features from AT&T? Right now I am using AT&T sim but when my device boots up it shows Verizon and all the Verizon stuff is there. Thoughts.....

playboy71322 said:
Is it possible to convert via firmware update a Verizon sim unlocked N960U to fully branded AT&T N960U to get wifi calling and all the other branded features from AT&T? Right now I am using AT&T sim but when my device boots up it shows Verizon and all the Verizon stuff is there. Thoughts.....
Click to expand...
Click to collapse
I believe it is. It's a couple of threads on XDA talking about changing firmwares.

ahenderson223 said:
I believe it is. It's a couple of threads on XDA talking about changing firmwares.
Click to expand...
Click to collapse
Thanks I figured it out.

Just in case someone stumbles on this thread I will post the solution.
You will need to flash the US Unlocked version of the phone then flash which ever carrier you want.

Just for clarification purposes, are you saying that once you flash the ATT firmware onto a Verizon device that all ATT functions work? Or did you have to also provision the IMEI to achieve this as well.?
Sent from my SM-N960U1 using Tapatalk

playboy71322 said:
Is it possible to convert via firmware update a Verizon sim unlocked N960U to fully branded AT&T N960U to get wifi calling and all the other branded features from AT&T? Right now I am using AT&T sim but when my device boots up it shows Verizon and all the Verizon stuff is there. Thoughts.....[/QUOi think so
Click to expand...
Click to collapse

mazzenn said:
playboy71322 said:
Is it possible to convert via firmware update a Verizon sim unlocked N960U to fully branded AT&T N960U to get wifi calling and all the other branded features from AT&T? Right now I am using AT&T sim but when my device boots up it shows Verizon and all the Verizon stuff is there. Thoughts.....[/QUOi think so
Click to expand...
Click to collapse
sorry for the late reply. But I was able to achieve everything working on my device now. Brief description of what I did to get everything to work:
1. flash unlocked firmware
2. flash att firmware (not unlocked)
3. put sim in another AT&T branded phone
4. Call AT&T have them activate and provision everything on account as normal
5. Put sim in note 9 and activate wifi calling feature
6. DONE you now have a fully fuctional AT&T device, I even got an update from their servers.
I can go into more detail of the steps if needed.
Click to expand...
Click to collapse

AT&T firmware Note 9 N960F/DS Exynos version
​
playboy71322 said:
mazzenn said:
sorry for the late reply. But I was able to achieve everything working on my device now. Brief description of what I did to get everything to work:
1. flash unlocked firmware
2. flash att firmware (not unlocked)
3. put sim in another AT&T branded phone
4. Call AT&T have them activate and provision everything on account as normal
5. Put sim in note 9 and activate wifi calling feature
6. DONE you now have a fully fuctional AT&T device, I even got an update from their servers.
I can go into more detail of the steps if needed.
Click to expand...
Click to collapse
I am looking for the AT&T firmware. I am currently in Kuwait and destroyed my phone. I had to buy an unlocked Note 9 version with the exynos cpu. The problem is I can't WIFI call or use any of the Volte functions my other phone had. Does anyone have the firmware for AT&T? Will that only work with snapdragon? I have already rooted this phone and it is ready to go. I need these functions so I can call back to the States.
Click to expand...
Click to collapse

This may be of help (instructions for all US Carriers apply) :
https://forum.xda-developers.com/galaxy-note-9/how-to/note-9-n960fd-dual-sim-csc-change-oxm-t3841000
Haven’t used it myself, so, if you have any questions, check with the OP & others who've posted in that thread.
Sent from my SM-N960U using XDA Labs

KOLIOSIS said:
I am looking for the AT&T firmware. I am currently in Kuwait and destroyed my phone. I had to buy an unlocked Note 9 version with the exynos cpu. The problem is I can't WIFI call or use any of the Volte functions my other phone had. Does anyone have the firmware for AT&T? Will that only work with snapdragon? I have already rooted this phone and it is ready to go. I need these functions so I can call back to the States.
Click to expand...
Click to collapse
This may be of help (instructions for all US Carriers apply) :
https://forum.xda-developers.com/galaxy-note-9/how-to/note-9-n960fd-dual-sim-csc-change-oxm-t3841000
Haven’t used it myself, so, if you have any questions, check with the OP & others who've posted in that thread.
Sent from my SM-N960U using XDA Labs[/QUOTE]
Thanks for the quick reply. It looks like I need to wait for Detonator to come out with the AT&T zip. It says coming soon so hopefully soon is in the next couple of weeks. That looks like the best route to go. This is the first phone I have ever rooted. I work with networks and sometimes software kicks me in the butt!

Manny10 said:
Thanks for the quick reply. It looks like I need to wait for Detonator to come out with the AT&T zip. It says coming soon so hopefully soon is in the next couple of weeks. That looks like the best route to go. This is the first phone I have ever rooted. I work with networks and sometimes software kicks me in the butt!
Click to expand...
Click to collapse
Since this will be the 1st phone you'll have rooted, be aware that, especially with Samsung devices, there's a couple of trade-offs that aren't reversible:
1) Samsung Pay will never work even if you unroot.
2) Knox features (I believe) are also a casualty.
There's an e-fuse, for lack of a better word, that once tripped on Samsung devices, cannot be reset. That's why even if you restore the phone to its original condition, those things will be permanently gone.
Sent from my SM-N960U using XDA Labs

playboy71322 said:
mazzenn said:
sorry for the late reply. But I was able to achieve everything working on my device now. Brief description of what I did to get everything to work:
1. flash unlocked firmware
2. flash att firmware (not unlocked)
3. put sim in another AT&T branded phone
4. Call AT&T have them activate and provision everything on account as normal
5. Put sim in note 9 and activate wifi calling feature
6. DONE you now have a fully fuctional AT&T device, I even got an update from their servers.
I can go into more detail of the steps if needed.
Click to expand...
Click to collapse
I have unlocked AT&T Note 9 but I want to use it on Verizon. I wonder if apply above steps with Verizon will work?
1. flash unlocked firmware
2. flash Verizon firmware (not unlocked)
3. put sim in another Verizon branded phone
4. Call Verizon have them activate and provision everything on account as normal
5. Put sim in note 9 and activate wifi calling feature
Click to expand...
Click to collapse

KOLIOSIS said:
Since this will be the 1st phone you'll have rooted, be aware that, especially with Samsung devices, there's a couple of trade-offs that aren't reversible:
1) Samsung Pay will never work even if you unroot.
2) Knox features (I believe) are also a casualty.
There's an e-fuse, for lack of a better word, that once tripped on Samsung devices, cannot be reset. That's why even if you restore the phone to its original condition, those things will be permanently gone.
Sent from my SM-N960U using XDA Labs
Click to expand...
Click to collapse
Thanks for the info. I read up on all of that and the trade off is worth it. I just need all the Volte features and hopefully the correct frequencies for the U.S. I had a note 3 forever and it got destroyed. I loved that phone. This Note 9 is awesome but without being able to manipulate the IMS settings it is a PITA. I just want to be able to call home from time to time. Emailing the wife is no fun especially with the tech available today. I will keep an eye out for Detonator to provide the AT&T CSCs and all that fun stuff. Then this phone will officially be outstanding. I do have to admit that the rooting process was fun. I am all about modified anything. Stock sucks. LOL

Hugo_US said:
playboy71322 said:
I have unlocked AT&T Note 9 but I want to use it on Verizon. I wonder if apply above steps with Verizon will work?
1. flash unlocked firmware
2. flash Verizon firmware (not unlocked)
3. put sim in another Verizon branded phone
4. Call Verizon have them activate and provision everything on account as normal
5. Put sim in note 9 and activate wifi calling feature
Click to expand...
Click to collapse
Im not a phone guru like others on here. But from my experience that is all I did. A really important step I didn't mention is leave the cable PLUGGED IN when you flash the unlocked software then the locked software. This caused my device to read the "sim info" and provision its self for ATT and get rid of the verizon stuff and install the ATT stuff. Hope this helps you out.
Click to expand...
Click to collapse

Can someone please post a link to the unlocked firmware for this phone? Im trying to convert a Verizon Note 9 to T-MO

Phonebricker said:
Can someone please post a link to the unlocked firmware for this phone? Im trying to convert a Verizon Note 9 to T-MO
Click to expand...
Click to collapse
Try this after root with TWRP.
http://tekhd.com/detonator/

Manny10 said:
Try this after root with TWRP.
http://tekhd.com/detonator/
Click to expand...
Click to collapse
if he has the verizon note 9 he cant root it or use twrp

Phonebricker said:
Can someone please post a link to the unlocked firmware for this phone? Im trying to convert a Verizon Note 9 to T-MO
Click to expand...
Click to collapse
I flashed the us factory on my note 9 from Verizon. I have LTE voice and wifi calling. Didn't trip Knox. No root required. Any particular reason you want tmobile firmware?

Droidguy816 said:
I flashed the us factory on my note 9 from Verizon. I have LTE voice and wifi calling. Didn't trip Knox. No root required. Any particular reason you want tmobile firmware?
Click to expand...
Click to collapse
Because my carrier is T-Mobile and my Note 9 came from Verizon. Can you provide a link to the factory firmware? Im hoping to flash to factory unbranded, then flash to t-mobile so I can use my video calling.
Thanks for any help

Phonebricker said:
Can someone please post a link to the unlocked firmware for this phone? Im trying to convert a Verizon Note 9 to T-MO
Click to expand...
Click to collapse
Phonebricker said:
Because my carrier is T-Mobile and my Note 9 came from Verizon. Can you provide a link to the factory firmware? Im hoping to flash to factory unbranded, then flash to t-mobile so I can use my video calling.
Thanks for any help
Click to expand...
Click to collapse
I'm also on tmobile. You need to remove your google account from the settings menu to turn off FRP lock in download mode. (You cant flash while its on)
This page helped me. Tks NICEGYPT
Stock US

Note 8 unlocked ??

Greetings,
Just received my new SM-N950U Note 8. Question is the box says it is a AT&T model but the software is T-Mobile. Baseband is N950USQS5CRK1 if it matters. Is that how it is supposed to be? I thought I was getting a factory unlocked Note 8.
Pat

The N950U is indeed the At&T model of the Note 8. However the seller may have unlocked the device so you can use any carriers SIM in it.

Branded and unlocked are two different things. You can buy a branded Note 8 which is unlocked, no issue.

It was advertised as a factory unlocked model. I just thought it would not have T-mobile software. I actually am on T-mobile so it's not a big deal I was just curious.

The unlocked model will install carrier software and splash screen by knowing what sim card you use. If you take it out and put in a different sim, it will magically change.

bobdelt said:
The unlocked model will install carrier software and splash screen by knowing what sim card you use. If you take it out and put in a different sim, it will magically change.
Click to expand...
Click to collapse
You're half right. The carrier models will do that. But if you're running the unlocked U1 firmware, it will not change any boot animation, splash screen, or add carrier apps. It will provision the SIM card for that carrier, but it will remain unbranded with no bloat.
---------- Post added at 09:23 AM ---------- Previous post was at 09:19 AM ----------
patcal said:
It was advertised as a factory unlocked model. I just thought it would not have T-mobile software. I actually am on T-mobile so it's not a big deal I was just curious.
Click to expand...
Click to collapse
You didn't get what you paid for. If it was advertised as "factory unlocked," and you got an ATT model that's false advertising. ATT models are carrier locked from the factory. They can be unlocked after paying them off through ATT.
They could TECHNICALLY get away with selling you a Verizon model and calling it factory unlocked, since they are unlocked from the factory, but that's still deceptive.
If you're happy, then no harm no foul. But if you really want a U1 model, then you'd have an argument for an exchange or refund.

Thanks for all the info. I am happy with the phone. It is performing as expected. I was just surprised to find the T-mobile app & boot animation when I got it. I really like it so far. My next step is do some more reading & see of I could flash a carrier free unlocked firmware. That's for another day though.
Pat

patcal said:
Thanks for all the info. I am happy with the phone. It is performing as expected. I was just surprised to find the T-mobile app & boot animation when I got it. I really like it so far. My next step is do some more reading & see of I could flash a carrier free unlocked firmware. That's for another day though.
Pat
Click to expand...
Click to collapse
You can. There's a guide for doing it. But to put it simply, download the U1 firmware with the SamFirm tool. Then flash it with patched ODIN 3.13.1.

Need help with LG V405

Why don't I see anyone talking about V40 Verizon, I have one, firmware V405UA20f and it doesn't have fastboot, can't enable oem unlock in deverlop setting. It's like using an iPhone lock. So what should I do if I want to root it and install a new rom?
Thanks

ShanaSGC said:
Why don't I see anyone talking about V40 Verizon, I have one, firmware V405UA20f and it doesn't have fastboot, can't enable oem unlock in deverlop setting. It's like using an iPhone lock. So what should I do if I want to root it and install a new rom?
Thanks
Click to expand...
Click to collapse
I've been a longtime rooter of cell phones, ever since the LG Ally. This particular phone doesn't seem to beg to be rooted, in my honest opinion. There is so much that can be done without rooting, and it also affords one to backup the phone on the external SD card. I can quite happily live with the phone as is in stock form.
Sent from my LM-V405 using Tapatalk

Einsteindks said:
I've been a longtime rooter of cell phones, ever since the LG Ally. This particular phone doesn't seem to beg to be rooted, in my honest opinion. There is so much that can be done without rooting, and it also affords one to backup the phone on the external SD card. I can quite happily live with the phone as is in stock form.
Click to expand...
Click to collapse
Yes, thanks for your opinion, I'm fine with the original rom, but I'm a little worried about the battery and customizations in my phone, I want to fix something. There must still be another way to root?

ShanaSGC said:
Yes, thanks for your opinion, I'm fine with the original rom, but I'm a little worried about the battery and customizations in my phone, I want to fix something. There must still be another way to root?
Click to expand...
Click to collapse
I never get US Carrier phones because they hate root and will try anyway to try disable or remove something so you cant do it, because they want you to use as is and they sucks with optimizations for new OS and slows down phone. This is why I get the US Unlocked model when LG releases it but sadly the V50 did not get a US Unlocked so Ill get the V60 if it does.

KouaV1 said:
I never get US Carrier phones because they hate root and will try anyway to try disable or remove something so you cant do it, because they want you to use as is and they sucks with optimizations for new OS and slows down phone. This is why I get the US Unlocked model when LG releases it but sadly the V50 did not get a US Unlocked so Ill get the V60 if it does.
Click to expand...
Click to collapse
Hope it does, btw I am in Vietnam and I can use Vietnam sim, so my phone is the unlocked version, isn't it?
Cause my phone still have Verizon app so im not sure

ShanaSGC said:
Hope it does, btw I am in Vietnam and I can use Vietnam sim, so my phone is the unlocked version, isn't it?
Cause my phone still have Verizon app so im not sure
Click to expand...
Click to collapse
Theres an international unlocked and an US unlocked model. You can tell by going into about phone and looking what model you have. Your phone was probably sim unlocked if it has verizon apps as an pre installed app. The international unlocked V40 variant should be V405EBW and the US unlocked variant is the V405QA7