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
Related
Hello
I have unlocked my s6 by using the metro pcs firmware upgrade method .
I have reflashed the t mobile deoxed version rom .
All was working fine until few hours ago when my phone stopped receiving network .
Reboot didnt work too until i switched on wifi back on .
Is it something to really worry about ?
One more queery: once i unlocked my phone does it mean its permanently unlocked to any network because right now im residing in asia .
younussm said:
Hello
I have unlocked my s6 by using the metro pcs firmware upgrade method .
I have reflashed the t mobile deoxed version rom .
All was working fine until few hours ago when my phone stopped receiving network .
Reboot didnt work too until i switched on wifi back on .
Is it something to really worry about ?
One more queery: once i unlocked my phone does it mean its permanently unlocked to any network because right now im residing in asia .
Click to expand...
Click to collapse
I think both questions have the same answer, you can't use any other firmware other than metro pcs. I remember seeing that in a different thread. If you paid it off free and clear call tmobile and they should permanently unlock it for free. I think all you need is your imei or serial number.
So can i reflash the metro pcs firmware and still have the device unlocked ?
I have purchased the unlock code off one of the leading sites on web.
I called T-mobile and pestered the hell out of them and they in return pestered the hell out me, in the end I have an unlocked phone with no flashing this and that.
younussm said:
So can i reflash the metro pcs firmware and still have the device unlocked ?
I have purchased the unlock code off one of the leading sites on web.
Click to expand...
Click to collapse
I can't give you a answer but why not call tmobile like ipaq_101 did? That way you don't need to care what firmware or rom your on, it will be universally unlocked. If long distance calling is a issue you can use the online help, just make sure the first rep you talk to knows you won't stop bothering them until it's unlocked.
Is it not possible to install a ROM and then, say, flash a MetroPCS modem or something? For the record, I'm in the same predicament; I'd like to flash a ROM, but am running stock MetroPCS firmware that allowed me to use an unlock code.
Sent from my Nexus 7 using Tapatalk
phobia09 said:
Is it not possible to install a ROM and then, say, flash a MetroPCS modem or something? For the record, I'm in the same predicament; I'd like to flash a ROM, but am running stock MetroPCS firmware that allowed me to use an unlock code.
Click to expand...
Click to collapse
You can flash any compatible ROM. I Odin flashed the MetroPCS firmware only so that I could permanently unlock the SIM. (I found that the T-Mobile Device Unlock is buggy and not exactly permanent). Then I flashed the international "F" version of Alliance ROM along with UniKernel. Been working great!
As long as you don't ever flash a T-Mobile radio, you'll stay unlocked!
I recently purchased the G920T factory unlocked version on eBay, is it safe to Odin any T-Mobile stock firmware, any info will be appreciated, thanks in advance.
Once you above a certain firmware you can't go back. What firmware you currently on?
It is currently on G920TUEU3COK1 can I Odin to the latest T-Mobile G920TUVS3DOJC I understand that I can't go back but is it safe and will it function normally, thanks for the reply.
i have this same question because from what ive read 3COK1 is for Cellular South (aka C Spire). while the 3DOJC is for Tmobile, both under the G920t firmware. are you also on tmobile network with this phone?
What are the benefits of flashing T-Mobile firmware on the USA factory unlocked phone? I have this phone on T-Mobile and wifi calling works. I also get great reception. I assume this phone will get Marshmallow months before T-Mobile releases their build
sebmw said:
It is currently on G920TUEU3COK1 can I Odin to the latest T-Mobile G920TUVS3DOJC I understand that I can't go back but is it safe and will it function normally, thanks for the reply.
Click to expand...
Click to collapse
Does this firmware that the device came with (G920TUEU3COK1) have any carrier branding or logos anywhere? Id like to switch if it doesn't have carrier branding
andreinept said:
Does this firmware that the device came with (G920TUEU3COK1) have any carrier branding or logos anywhere? Id like to switch if it doesn't have carrier branding
Click to expand...
Click to collapse
It has no carrier branding or logos anywhere.
HKSpeed said:
What are the benefits of flashing T-Mobile firmware on the USA factory unlocked phone? I have this phone on T-Mobile and wifi calling works. I also get great reception. I assume this phone will get Marshmallow months before T-Mobile releases their build
Click to expand...
Click to collapse
Are you getting LTE on it.
So I flashed the C Spire firmware and it asked for an unlock code. I flashed back to the original tmobile firmware and it is still locked although it was unlocked before, but the device unlock app says its ineligible for unlock now.
Anybody else encountered this?
Call t mobile customer service and ask them. They can adjust their servers and then the unlock app will work.
tyrone1 said:
Call t mobile customer service and ask them. They can adjust their servers and then the unlock app will work.
Click to expand...
Click to collapse
have you tried it before? because they keep saying that they cant do it
sebmw said:
Are you getting LTE on it.
Click to expand...
Click to collapse
I get LTE. Sometimes get "LTE+". Whatever that means.
andreinept said:
have you tried it before? because they keep saying that they cant do it
Click to expand...
Click to collapse
I'm sorry I misread that this a different model. I'd try to contact the user stifilz to unlock.
andreinept said:
So I flashed the C Spire firmware and it asked for an unlock code. I flashed back to the original tmobile firmware and it is still locked although it was unlocked before, but the device unlock app says its ineligible for unlock now.
Anybody else encountered this?
Click to expand...
Click to collapse
Were you able to get it unlocked? I plan on doing the same, flashing the unbranded to my t-mobile that is currently unlocked.
mon7707 said:
Were you able to get it unlocked? I plan on doing the same, flashing the unbranded to my t-mobile that is currently unlocked.
Click to expand...
Click to collapse
I'd advise that you dont.
To unlock it I had to flash back to the original tmobile rom. From the tmobile rom, the device unlock app failed in different ways.
After i called tmobile over and over I got it unlocked (like 2 hours of calling).
Hurts my heart to see all the tmobile bloat, especially when i dont even live in the US, but at least my phone works
andreinept said:
I'd advise that you dont.
To unlock it I had to flash back to the original tmobile rom. From the tmobile rom, the device unlock app failed in different ways.
After i called tmobile over and over I got it unlocked (like 2 hours of calling).
Hurts my heart to see all the tmobile bloat, especially when i dont even live in the US, but at least my phone works
Click to expand...
Click to collapse
Thank you, I guess I'll just sell this one and buy an international unlocked, glad to hear you got your phone working.
Anyone successfully updated this G920TUEU3COK1 US factory unlocked version to marshmallow? I have Samsung Pay, wifi calling, etc. all enabled on mine and would like to update, but also keep the unlocked non-bloated firmware.
losonn said:
Anyone successfully updated this G920TUEU3COK1 US factory unlocked version to marshmallow? I have Samsung Pay, wifi calling, etc. all enabled on mine and would like to update, but also keep the unlocked non-bloated firmware.
Click to expand...
Click to collapse
Yes its works. However it does add in tmobile bloatware, not bad tho, only about 5 apps
Sent from my SM-G920T using XDA-Developers mobile app
ejbmvp said:
Yes its works. However it does add in tmobile bloatware, not bad tho, only about 5 apps
Sent from my SM-G920T using XDA-Developers mobile app
Click to expand...
Click to collapse
Which method did you use to update the G920TUEU3COK1 US factory unlocked version? Does using the Tmo firmware risk un-unlocking the phone?
losonn said:
Which method did you use to update the G920TUEU3COK1 US factory unlocked version? Does using the Tmo firmware risk un-unlocking the phone?
Click to expand...
Click to collapse
Flashed t-mobile mm via odin. After rebooted it complained about network lock since Im using att sim. I put it back to dl mode. Extracted modem.bin from our 5.1.1 build and Flashed via odin. Bam no more network lock and able to use att sim again.
Followed reddit thread
Sent from my SM-G920T using XDA-Developers mobile app
HI, i had this version and i didn't find any data related to it like firmware , i noticed that everything run smoothly and mobile run the latest update (your system is up to date ) lollipop and model n920f was written on the back although of that when i tried to use Samsung info apk it showed that phone made in Korea and it was Verizon version n 920v so i figured out that phone was a Verizon version and was moved to china to be unlocked and back was replaced also so, am i right ? and if i am right , can i download Verizon marshmallow update without problems.
I thought the f was an international version which hadn't been released. Its usually the tag for european models, which of course wasn't released for the note 5.
bonerp said:
I thought the f was an international version which hadn't been released. Its usually the tag for european models, which of course wasn't released for the note 5.
Click to expand...
Click to collapse
I know that it seems to me an assembled version hardware mad in Korea for American company Verizon and was sent to china to be unlocked version so they changed the model to n920f instead of n920v and applied modified soft and kernel and they replaced the back also and wrote n920 f
What do you think bonerp ?
Any ideas guys
ahmeedtop29 said:
Any ideas guys
Click to expand...
Click to collapse
The 'F' variant for Samsung devices is usually for European countries, but Samsung never released Note5 officially in Europe.
There is no N920F, the international variant is the N920C, If the actual device is N920V then those firmware should work.
Download and install : https://play.google.com/store/apps/details?id=org.vndnguyen.phoneinfo&hl=en_GB
And see what the bootloader and modems are, they should specify what the actual phone is.
Remember that you are responsible for what you do to your device so proceed with caution and always back-up your data.
Here are screenshots from Samsung info apk , what do you think ?
؟؟؟؟؟؟؟
Any ideas guys
Any ideas guys
ahmeedtop29 said:
Any ideas guys
Click to expand...
Click to collapse
It's a sprint model, you should be able to flash N920P firmware; It seems like the phone is running a custom ROM which has the CSC of the N920V.
Again you are responsible for what you do to your device so make a back-up before you attempt anything.
Battlehero said:
It's a sprint model, you should be able to flash N920P firmware; It seems like the phone is running a custom ROM which has the CSC of the N920V.
Again you are responsible for what you do to your device so make a back-up before you attempt anything.
Click to expand...
Click to collapse
Depending on phone info apk it showed that model is n920v Verizon but you said its a sprint version i am confused.
how did you know it is a n920p not n920v ?
ahmeedtop29 said:
Depending on phone info apk it showed that model is n920v Verizon but you said its a sprint version i am confused.
how did you know it is a n920p not n920v ?
Click to expand...
Click to collapse
The bootloader and baseband belong to N920P.
http://www.sammobile.com/firmwares/download/58061/N920VVRU2AOJ2_N920VVZW2AOJ2_VZW/
http://www.sammobile.com/firmwares/download/56804/N920PVPU2AOI6_N920PSPT2AOI6_SPR/
It's kind of confusing because your KNOX counter is not tripped but the firmware on your device seems to a mix between N920V and N920P with the Chinese and Sprint CSC
Battlehero said:
The bootloader and baseband belong to N920P.
http://www.sammobile.com/firmwares/download/58061/N920VVRU2AOJ2_N920VVZW2AOJ2_VZW/
http://www.sammobile.com/firmwares/download/56804/N920PVPU2AOI6_N920PSPT2AOI6_SPR/
It's kind of confusing because your KNOX counter is not tripped but the firmware on your device seems to a mix between N920V and N920P with the Chinese and Sprint CSC
Click to expand...
Click to collapse
You are right it seems to me that n920f is fake although of that my device is original one n920p and modded into a chinese version to be unlocked device thank you but i am a little bit worry if i download n920p firmware maybe it locked and askes me code number to unlock the device so before i download it any idea how can i know it is locked or unlocked device ?
?????
up up up
up up up
ahmeedtop29 said:
up up up
Click to expand...
Click to collapse
I'll be honest if there was a way to unlock sprint phones that way we'd already know about it, put in a T-Mobile sim and an att sim if they both work it's unlocked you can use any SIM cards if they work it's unlocked as long as you don't use sprint and Verizon for the rest. I'm very confident it's unlocked if it's not, it can be done easily
GOIGIG said:
I'll be honest if there was a way to unlock sprint phones that way we'd already know about it, put in a T-Mobile sim and an att Sim if they both work it's unlocked you can use any SIM cards if they work it's unlocked as long as you don't use sprint and Verizon for the rest. I'm very confident it's unlocked if it's not, it can be done easily
Click to expand...
Click to collapse
I cant use t mobile or att Sim cause i am from Egypt but i put Vodafone Sim and it works perfectly till now so, What do you think its unlocked or locked phone ?
ahmeedtop29 said:
I cant use t mobile or att Sim cause i am from Egypt but i put Vodafone Sim and it works perfectly till now so, What do you think its unlocked or locked phone ?
Click to expand...
Click to collapse
It very well I
Should be unlocked just don't use formware backup or restore just in case (I've lost my network lock after a restore)
Hello, guys! I`m using my s6 at&t in Ukraine, and it works perfectly with my sim. Firmware is 5.1.1 Is it possible to install 6.x and it is possible to get my phone locked to at&t after installin it? thanks in advance
I doubt that if your phone is a unlocked phone also known as a sim unlock phone that is that it can be used with any carrier would get locked due to a software update. Since you mentioned that you are in Ukraine and if it works with the local sim that means that the phone is a sim unlocked phone and would probably not be affected by a software update.
Also just use odin to update the phone
mnp261194 said:
I doubt that if your phone is a unlocked phone also known as a sim unlock phone that is that it can be used with any carrier would get locked due to a software update. Since you mentioned that you are in Ukraine and if it works with the local sim that means that the phone is a sim unlocked phone and would probably not be affected by a software update.
Also just use odin to update the phone
Click to expand...
Click to collapse
Thank you so much! i will try to upgrade it
hello everyone! i have galaxy s6 g920t variant i mistakenly flashed cellular south firmware on it but now when i want to reflash tmobile firmware it is showing an error sw check failed device 5 binary 4 plz help
Plzzz help guys
I think after flashing cellular south firmware it is now carrier locked plz help me plzzzzzz guys
Navedsid said:
I think after flashing cellular south firmware it is now carrier locked plz help me plzzzzzz guys
Click to expand...
Click to collapse
Yes, you should be seeing a "enter code" sim lock screen. T-mobile uses a unlock app. if your phone was unlocked before on t-mobile it can be unlocked after you flash back to t-mobile firmware.(and may need to run the unlock app).
I have gone back and fort on 2 of my SM-G920T phones between t-mobile and other firmware including the metro PCS SM-G920T1 one so it should work to go back.
Sounds like you need to re-download the stock t-mobile firmware and flash in odin.
[email protected] said:
Yes, you should be seeing a "enter code" sim lock screen. T-mobile uses a unlock app. if your phone was unlocked before on t-mobile it can be unlocked after you flash back to t-mobile firmware.(and may need to run the unlock app).
I have gone back and fort on 2 of my SM-G920T phones between t-mobile and other firmware including the metro PCS SM-G920T1 one so it should work to go back.
Sounds like you need to re-download the stock t-mobile firmware and flash in odin.
Click to expand...
Click to collapse
i have managed to get the phone sim unlocked but the firmware is still DPL1 of cellular south.... if i update the firmware of the device back to tmobile will i have to unlock it again or not... plz help i have paid INR 1800 to get this cellular south ****ty firmware unlocked i dont want to pay again for the same ****... PLZ help
Navedsid said:
i have managed to get the phone sim unlocked but the firmware is still DPL1 of cellular south.... if i update the firmware of the device back to tmobile will i have to unlock it again or not... plz help i have paid INR 1800 to get this cellular south ****ty firmware unlocked i dont want to pay again for the same ****... PLZ help
Click to expand...
Click to collapse
99% sure will be locked again once you go back to t-mobile as they use an app to authenticate.
[email protected] said:
99% sure will be locked again once you go back to t-mobile as they use an app to authenticate.
Click to expand...
Click to collapse
but i have unlocked the phone on tmobile rom... but firmware is of DPL1 of cellular south ... i have flashed twrp on it and then Twisted-MM-Base which had the tmobile system... the guy at the shop unlocked but dont know how bcz as u knw it didnt asked for any code or such thing... now my phone is network unlocked i have installed XtreStoLite-ROM-3.3.1-DPDP no probs till now... but i wanna go back to tmobile firmware but i fear that i will have to get it unlocked again... however before i flashed this DPL1 my phone was unlocked on tmobile firmware.... So kinda plz tell if i flash MY EPF1 Firmware,,, will i face any unlocking issue
Navedsid said:
but i have unlocked the phone on tmobile rom... but firmware is of DPL1 of cellular south ... i have flashed twrp on it and then Twisted-MM-Base which had the tmobile system... the guy at the shop unlocked but dont know how bcz as u knw it didnt asked for any code or such thing... now my phone is network unlocked i have installed XtreStoLite-ROM-3.3.1-DPDP no probs till now... but i wanna go back to tmobile firmware but i fear that i will have to get it unlocked again... however before i flashed this DPL1 my phone was unlocked on tmobile firmware.... So kinda plz tell if i flash MY EPF1 Firmware,,, will i face any unlocking issue
Click to expand...
Click to collapse
If it was unlocked before on t-mobile you should be good. most you would need to do is run the t-mobile unlock app. just make sure you have a twrp backup just in case you need to go back to the rom that is working.