Back to Stock from a T-Mobile (unlocked) S2 - Galaxy S II Q&A, Help & Troubleshooting

Hi all,
I got my S2 from T-Mobile UK and have rooted the phone and also installed another firmware on it.
I've also unlocked the phone so it can be used on any network (as I was promised it would be when I bought it, but it wasn't)
If I wish to move back to stock ICS before I sell the phone, must I install a T-Mobile rom or can I install the Samsung release
If I do any of these will the phone remain unlocked to be used on any network
thanks in advance

walkerx said:
Hi all,
If I wish to move back to stock ICS before I sell the phone, must I install a T-Mobile rom or can I install the Samsung release
Either TMobile or Samsung stock .
If I do any of these will the phone remain unlocked to be used on any network
Always .
jje
Click to expand...
Click to collapse

Related

Kinda Need help from Indian Users

Ok my actuall forum is galaxy mini forums...Well i decided to Upgrade my Device and Buy a S III
Well i live in india and what i did was i called up my friend living on USA and bought SIII with help of her!
Well She bought a T-Mobile SIII Having A Sim card slot..well and before even telling her not to buy that and to buy a normal one..she kinds shipped it..and will be available to me in like 2-3 weeks(idk how long it takes ..she shipped it today morning)
Well my qwestion is T-mobile cant be used in india..well i want to unlock it to use in Vodafone Carrier in India..Idk is that possible? and if i even unlock it..will i be able to use EDGE? and not being charged cuz i recharge with a data card...Will appreciate some help
Fellow Galaxian
Rik[Rittik]
Question asked in the thread for Indian users may get an answer .
jje
Ty i am gonna ask it there too
Rik[Rittik]
Rittik said:
Ok my actuall forum is galaxy mini forums...Well i decided to Upgrade my Device and Buy a S III
Well i live in india and what i did was i called up my friend living on USA and bought SIII with help of her!
Well She bought a T-Mobile SIII Having A Sim card slot..well and before even telling her not to buy that and to buy a normal one..she kinds shipped it..and will be available to me in like 2-3 weeks(idk how long it takes ..she shipped it today morning)
Well my qwestion is T-mobile cant be used in india..well i want to unlock it to use in Vodafone Carrier in India..Idk is that possible? and if i even unlock it..will i be able to use EDGE? and not being charged cuz i recharge with a data card...Will appreciate some help
Fellow Galaxian
Rik[Rittik]
Click to expand...
Click to collapse
go to galaxy sIII forum..
find out the rooting method for it..
get any custom ROM.. It'll remove all carrier-bounds!
Straight from my U8800PRO..
Current ROM: ShenDu OS-121227-DEV [Android 4.1.2 (JB)] with cuvetto's framework.jar
prakharkmr27 said:
go to galaxy sIII forum..
find out the rooting method for it..
get any custom ROM.. It'll remove all carrier-bounds!
Straight from my U8800PRO..
Current ROM: ShenDu OS-121227-DEV [Android 4.1.2 (JB)] with cuvetto's framework.jar
Click to expand...
Click to collapse
@prakharkmr27 Custom Rom does not unlock the Sim slots it inly removes the bloatwares.
EDIT- Its a 3months old thread dude why have u revived it ?

[Q] Factory Unlocked S3 from China Flashed w/Official JB ROM GlobeTelecoms Ph

Hi there! I really hope someone could help me
with my problem. Well first of, I'm an entire noob with
Androids as I have been a Nokia loyalist
(sucks to be me). I have a factory unlocked S3 GT-i9300
bought from China and was sent to me
here in the Philippines. I have tried
upgrading it to JB 4.1.1 via OTA and Kies
but I've had encountered roadblocks for
the longest time. That's when a friend of mine suggested to use Odin but the
mofo didn't tell me that there were
other stuff that I need to consider (all
the Phone, PDA and CSC stuff posted in
the first post of this thread). So I
downloaded from www.samfirmware.com an official JB 4.1.1 ROM for Globe Telecoms
Philippines since that's the network that
I'm using and flashed it on my S3 via
Odin. Everything went well except for
the part where I'm being asked for a
network unlock code! WAAAAH! My phone is now locked and I don't
even where it's locked to. Is there a way for me to unlock it again
without having to pay those unlock
code generators? PLEASE HELP!!! TIA!
Here is your answer.-> http://forum.xda-developers.com/showthread.php?t=1839200

Lose unlock if I flash new rom?

So...my cousin bought a S3 and it was locked on Vodafone Romania so he go to a service and unlocked it,he told me that the guys from the service rooted it device,true...but it doesn't have SuperSU,it has a program wich is in chinese,don't know the name.My question is:if I try to install a new ROM on its device will the phone be locked again on Vodafone RO?
gabyif said:
So...my cousin bought a S3 and it was locked on Vodafone Romania so he go to a service and unlocked it,he told me that the guys from the service rooted it device,true...but it doesn't have SuperSU,it has a program wich is in chinese,don't know the name.My question is:if I try to install a new ROM on its device will the phone be locked again on Vodafone RO?
Click to expand...
Click to collapse
No if it was done properly.
I would also try to find out what they installed on the phone because if they rooted it like you said they could have installed anything on your phone (don't want to scare you) the Chinese app is probably nothing to worry about but just be careful rooting your device gives access to everything on your phone.

[Q] Unlocked AT&T S5 on T-Mobile

I recently unlocked and rooted my AT&T Galaxy S5 to use on T-Mobile network. However I still have AT&T firmware on the phone, and I'd really like to flash cyanogenmod, or at at the very least stock T-Mobile. Is there any way to do this? Thanks in advance!
Demeos said:
I recently unlocked and rooted my AT&T Galaxy S5 to use on T-Mobile network. However I still have AT&T firmware on the phone, and I'd really like to flash cyanogenmod, or at at the very least stock T-Mobile. Is there any way to do this? Thanks in advance!
Click to expand...
Click to collapse
Don't know if there is a Cyogenmod available for your model (SM-G900A) but there is an AllianceRom which is built off the T-mobile SM-G900T firmware which will work on the AT&T S5. However, since that version of the S5 has a locked bootloader you will need to use Safestrap Recovery instead of TWRP. You might want to look among the threads in the AT&T S5 area of this forum for more information and maybe ask your question there. I brought my unlocked AT&T S5 over to T-mobile and used it for a few months before getting a T-mobile S5. AT&T stock s5 firmware worked fine. I also did try out AllianceRom on that phone briefly but stick with stock. I don't think rom slots ever got fixed on Safestrap so only the stock rom slot could be used for flashing which is one of the reasons I chose to stick with stock on that phone.
..

flash unlocked Verizon s4 ?

i have a Verizon s4 . its unlocked. i am using it in india . i cant find any lollipop firmware without Verizon carrier . how do i upgrade my device to 5.0 ?
I'm guessing you want t update to lolipop but can't because Verizon isn't in India? There's Muniz's rooted stock OF1 in the general section.
bangdosa said:
I'm guessing you want t update to lolipop but can't because Verizon isn't in India? There's Muniz's rooted stock OF1 in the general section.
Click to expand...
Click to collapse
thank you for your help i am new to flashing . can you give me link please . i don't know what is munzi or of1 . . can i flash it with Odin ? is it safe like original roms?
are you rooted? If not could you tell me which build number your phone is currently at?
As for Muniz, he's a guy who works on rooting our galaxy s4 =)
the latest build for verizon galaxy s4 ends in OF1. it is Android Lolipop, 5.0.1
his instructions are here.
you'll need root to follow the directions.
bangdosa said:
are you rooted? If not could you tell me which build number your phone is currently at?
As for Muniz, he's a guy who works on rooting our galaxy s4 =)
the latest build for verizon galaxy s4 ends in OF1. it is Android Lolipop, 5.0.1
his instructions are here.
you'll need root to follow the directions.
Click to expand...
Click to collapse
from the looks of things , this looks risky . i would rather have a unbricked s4 without lollipop thanks for your help. is it possible to root s4 with iroot ?
It's not really that risky.
best way to root kitkat Verizon galaxy s4 is to use towelroot with NC5 build kernal
Verizon's Galaxy s4 is supposed to be unlocked by default, its just rooting is an option just in case you dont like the look of the s4's lolipop. if you want just complete current stock lolipop build OF1 you can download it here and use ODIN to flash, or just use Samsung kies software.
just so you know if you use the sammobile method or kies method to update to lolipop, you cannot go back down to kitkat. Muniz's method with root allows you to return to kitkat builds if you so desire.
by the way what happens when we flash a rom with carrier to a unlocked phone ?
bangdosa said:
It's not really that risky.
best way to root kitkat Verizon galaxy s4 is to use towelroot with NC5 build kernal
Verizon's Galaxy s4 is supposed to be unlocked by default, its just rooting is an option just in case you dont like the look of the s4's lolipop. if you want just complete current stock lolipop build OF1 you can download it here and use ODIN to flash, or just use Samsung kies software.
just so you know if you use the sammobile method or kies method to update to lolipop, you cannot go back down to kitkat. Muniz's method with root allows you to return to kitkat builds if you so desire.
Click to expand...
Click to collapse
wait a minute . the link you just send me . . isn't it a rom with Verizon carrier . my phone will remain unlocked if i flash it ?????
You do realize that Verizon phones are supposed to be GSM unlocked by default due to some agreement with FCC for their bands?
From here
Unlocking a Verizon phone
Even though Verizon uses CDMA instead of GSM, most of Big Red’s devices come with an unlocked SIM card slot. According to Verizon, its 4G LTE devices aren’t locked and, if you want to bring one of them to another carrier, there is no code needed to program the phone to play nice with it.
However, even though SIM-equipped Verizon phones can be used on AT&T, T-Mobile, or other GSM carriers, the phone will need to have roaming GSM radios in order to make phone calls and send texts in the United States. While most recent Verizon handsets will work just fine on American GSM bands, your mileage will vary when it comes to LTE support.
Even though Verizon doesn’t have an online unlock request, you can call 1-800-711-8300 and request a SIM unlock.
Read more: http://www.digitaltrends.com/mobile/phone-unlocking-guide-for-all-carriers/#ixzz3nah3dHaY
Follow us: @digitaltrends on Twitter | digitaltrendsftw on Facebook
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bangdosa said:
You do realize that Verizon phones are supposed to be GSM unlocked by default due to some agreement with FCC for their bands?
Click to expand...
Click to collapse
sorry for my lack of knowledge . i didn't know that . i bought it from my friend . i thought it was locked by verizon and he got it unlocked for Indian sims .
well, then the choice is yours, you can root your phone and use muniz's method to allow you the option of going back to kitkat if you desire, or just use normal methods like samsung kies to update normally, which will lock the bootloader so you can't downgrade.
As for me, I'm going to(try to) sleep. 3 AM here X(
ahsanali32 said:
sorry for my lack of knowledge . i didn't know that . i bought it from my friend . i thought it was locked by verizon and he got it unlocked for Indian sims .
Click to expand...
Click to collapse
thanks buddy you were very helpful . my last question what happens when we flash a rom with carrier to an unlocked phone .
bangdosa said:
well, then the choice is yours, you can root your phone and use muniz's method to allow you the option of going back to kitkat if you desire, or just use normal methods like samsung kies to update normally, which will lock the bootloader so you can't downgrade.
As for me, I'm going to(try to) sleep. 3 AM here X(
Click to expand...
Click to collapse
thanks buddy you were very helpful . my last question what happens when we flash a rom with carrier to an unlocked phone .
well... if it was one of those international versions of the galaxy s4 like the GT-I9500, then you'd probably brick it by flashing a rom for a carrier version like the SCH-i545. or at the very least softbrick it.
I think unlocking phones is something more hard coded than the rom itself. cause, even if for example you have a att phone unlocked, it still has a att rom, and should be able to update the rom while using an att sim
though in your case, I have a feeling whoever "unlocked" your phone never bothered anything other than change the APN settings to that of whatever Indian carrier you were using.
your phone shoulnt have any problems with flashing an update via kies.
check your build number under settings> more> about phone. if they match any of the PDA here, you're on stock. using network signal info app in the play store can also tell you the build number (build ID) and bootloader.
though if your phone doesn't say "custom" when you boot it from power'ed off, that you're probably on a stock rom with no root

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