[Q] Regarding sim lock while flashing rom - Windows Phone 8 Q&A, Help & Troubleshooting

I have a Lumia 520. Did register my phone for dev prieviews as you all know that wo 8.1 is due this week. I want cortana on my phone but they aren't releasing it outside of the US until the next year. My phone is an unlocked Indian variant, so I want to flash the us at&t rom on my phone. Now, the question: the phone is sim unlocked, would flashing the at&t version lock the phone to their carrier. Remember, I live in India.

Related

[Q] Query on T-Mobile version of HD7

I am gonna get a HD7 today from a person who inturn has gotten it from US ( and I'm in Asia), and its a T-Mobile branded phone and is unlocked. The seller doesn't know anything on how it was unlocked.
My queries are:
1. Is it possible to know, How this phone was unlocked ?
2. Is the lock a permanent one ? (I mean, I don't like the phone getting locked again after I perform an update)
3. Any other downsides or restrictions that I might face using this T-Mobile version of HD7 (VS. a Factory Unlocked version of HD7)
All and any feedbacks are welcome
Urgent!!

[Q] Unbranding a nokia 520

I have asked on wpcentral and wanted to get more people's opionons, I was thinking of flashing a CV rom to get updates faster. My phone is the 520 and it is SIM locked. It is using rm-915. I am wondering if it is sim locked and I used a different rom, from another country or global rom. Would I have a sim issue since it is locked to ATT.
2. How hard is it to brick a Lumia,
3. How easy is it to unbrick one
4. Voids the warranty right?
The only guy that answered my questions on wpcentral said he never has bricked one and they are easy to unbrick.
Also said I shouldn't have an issue with the sim.
The only typical way that they are bricked are when the device tries to do an update, but you get the "spinning gears of death" for hours on end. That's the update screen, but it shouldn't last more than 15 minutes.
To unbrick it, you just need to hold volup when turning on and reflash it.
It technically voids the warranty, but I have no way of knowing.
The phone would still be locked to AT&T, but it almost more useful to say on the ROM that's in it. AFAIK the US CV doesn't have the GDR3/Black update out yet for the Lumia 520.
Would I get a SIM error if I used an international rom for the 520.
For the rm915 there is a light swap eng global. Someone recommended the Brazil CV and another said Indian since they have black.
Sent from my Nokia Lumia 520
I have heard that going from a newer version firmware back to an older one would cause a brick. I was looking at the Brazil one and it says 3046.0000.1329.2002 and my current one is att 3043.0000.1324.0001
Sent from my Nokia Lumia 520

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

International or T-Mobile ROM on unrooted stock unlocked ATT phone?

Hi. I am new on this forum and don't know much about rooting and the requirements of such high complex stuff. But I have an ATT unlocked phone which I use on t mobile. It's lacks WiFi calling, whxih I want, and the signal is probably 1 bar lower than it should. Not to mention I can't update my software since ATT servers for the update won't communicate with my phone since I'm no longer and ATT customer and they are generally very slow with their updates
Anyway is it possible to put a international ROM, say the new marshmallow ROM, or even a T-Mobile ROM on my phone? How would one do that? I am aware of odin as I use it to update my software from time to time. Do I just get the international or T-Mobile ROM and flash it?
Thanks.
No way , at&t have a locked bootloader, ):
international..any day..dont even think abt it
Been trying to do this forever. Still no luck.
Anyway to unlock the bootloader? Would my best bet to sell the phone and just get the unlocked one?
AT&T no way , yes get the 925f

Firmware question

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

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