can installing stock rom in an unlocked phone lock it again - Android Q&A, Help & Troubleshooting

..I was already told by a friend in xda group that if I again flash a stock rom in my sm-900p phone which I got unlocked for international GSM use (using from India) , it won't get locked again ...with all due respect to the friend who affirmed me already that it won't get locked ,can anyone else confirm that to me please ? I am not able to dare to flash the stock rom....since two days I am just waiting to take that step..presently I am using darkwolf rom but I want to flash with stock rom so that bootloader and modem gets updated and then on that version,I will flash this rom again ..that's my plan

It will not relock for international use. If it does for some reason, you can use Galaxy Tools to unlock again, assuming you root. But if it was originally unlocked either officially with Sprint or via root + Galaxy Tools, then it won't relock. If you were in the US, you would have to change some other settings to re-enable domestic unlock but international sticks.

Related

[Q] Want to jailbreak but dont know if boatloader is already unlocked

Hi everybody.
I just acquiered a note 2 (SCH-i605). And I found that it has been already rooted. I can use non verizon sim whith it. But i dont know if the bootloader is unlocked. I did some researsh but cant find out if there is a relationship between unlocked bootloader and the possibility of using another operator sim. The recovery is stock.
So i want to use "No You Verizon" program from AdamOutler thread http://forum.xda-developers.com/showthread.php?t=2272066
There are my questions:
- If the bootloader was already unlocked, will using the "No You Verizon" brick the device or cause any problem?
-The current android version on the device is 4.1.1 . After jailbreak, root, recovery with "No You Verizon" can i directly flash any custom rom (like AOKP kitkat or an AOSP 4.2 custom rom ....) without any workaround?
-If i do so (flashing a custom rom), will bootloader still unlocked?
Ps: My understanding is that to be able to unlock the bootloader i should stick to version 4.1.1 up to 4.2 .... of stock touchwise firmware. If i flash the stock 4.3 i wont be able to unlock the bootloader. im i right?
Thank you and sorry for my english.
I find my answers
Well, i think i find my answers. Maybe it will help someone else.
1- If i flash 4.3 OTA i will have a locked bootloader (forever or use safestrap)
2- To jailbreak, according to the version of my firmware i will use the corresponding Casual program from Adams casual thread
3- After jailbreaking, rooting, installing custom recovery i can flash any custom rom (directly in recovery, not with odin)
4- Depending on the custom rom i will need to update the firmware
Usefull threads are in Verizon Galaxy Note II Android Development section.

[Q] t mobile gs5 rooted and unlocked, will stock rom remove carrier unlocked

hey everyone, I don't post much but I read a lot and I appreciate everyone's work. I have a quick question regarding my tmobile galaxy s5. I bought it and unlocked it to use on AT&T because it has the unlocked bootloader. I installed twirp, remove some bloatware, and it's been great. I want to remove twirp but I believe that flashing the stock rom is the only option. Is this true? I have the stock image and can flash it via Odin I'm just curious as to whether it will remove the carrier unlock. of course I paid for the unlock code and I don't want to do it again. I would like to sell this phone with it being unlocked because that widens the market. so does anyone know how I can unroot this phone other than flashing the stock image, and if that's the only way after I do it will the carrier unlock still be there?
Galaxy s5
Galaxy tab pro 8.4
You will keep the unlock. You can easily find the stock recovery files as well. That way you don't lose all of your stuff with a full Odin flash.

Rooted & unlocked question

I'm selling my Sprint Note 3 that I had rooted before the lollipop upgrade. Since then I put a lollipop rom on it.
Two stupid noobie questions that I couldn't find answers to when I searched ..
1. Since I'm rooted am I also unlocked ... can he use an att Sim card and use it on att?
2. Do I need a specific rom that would make this possible ... or is there a way to test it to prove to him that it works?
Thanks for the answers.
Just FYI... There's a difference between unlocked carrier and unlocked boot loader.
You do not need a custom ROM to use another Sim card, but you need to unlock the carrier on the phone
Sent from my Nexus 9 using XDA Free mobile app
Is there a way to tell if I did a carrier unlock? I don't really even remember what method I used to root it.
You unlock the boot loader to flash a custom rom?
To sim unlock you would have had to run SSU.app or GT.app to international unlock then odined a older radio mj4 or mi3. Then change the APNs to match the carrier's settings for internet and mms messages.
I called sprint and got the master unlock codes ... is there an easy way to unlock it now that I have those?

[Q] For Experienced sim unlock

Hey I've never had a sim unlock device, my friend has a verizon s4 unlocked for tmobile she is still running on either Gingerbread or something that's very old lbs. I was wondering if I root and flash an updated rom with no bloat will it still work on tmobile? also can i flash tmobile roms or only verizon?
SkinnyBiggs said:
Hey I've never had a sim unlock device, my friend has a verizon s4 unlocked for tmobile she is still running on either Gingerbread or something that's very old lbs. I was wondering if I root and flash an updated rom with no bloat will it still work on tmobile? also can i flash tmobile roms or only verizon?
Click to expand...
Click to collapse
Verizon phones typically have unlockable bootloaders.
If you have the MDK build you can unlock the bootloader, flash custom recoveries, roms, etc. root and such. You would need to become familiar with using Odin. From your post it would seem you are confusing sim unlock with bootloader unlock. Sim unlocked merely means you can use the phone with any service providers. Provided the radios are compatible.
If the build is other than MDK you may be able to use Safestrap to load custom roms.
All tricky. Do a lot of research first.
All galaxy phones s3 s4 s5 s6 etc are world unlocked you can put a any Sim card in it and it will switch to global network your carriers will not tell you this information

sprint lg v30 can i flash other carrier roms

When i had my galaxy s7 on sprint i was able to flash other carrier roms and unlocked version roms through samsung flash tool .Can this be done with lg phones on some kind of flash tool ? Sorry for question just was wondering i use to flash unlocked version on my sprint v30 to have a bloat free phone
So the question I have is this. If you are going to root and unlock the phone anyway, why not just remove the bloatware on the phone? Why concern yourself with other carriers?
If all the carriers are equal as far as communication frequencies are concerned, then unlocking the phone is all you really need. Once unlocked (you don't even need to root for this) you can go to any carrier.
I could do that without root. And flashing unlocked version rom has no carrier bloat. Also i said nothing about rooting
nizmoboy98 said:
I could do that without root. And flashing unlocked version rom has no carrier bloat. Also i said nothing about rooting
Click to expand...
Click to collapse
If memory serves and may not, so unless something has changed, flashing any function on an android phone requires root access.
nizmoboy98 said:
When i had my galaxy s7 on sprint i was able to flash other carrier roms and unlocked version roms through samsung flash tool .Can this be done with lg phones on some kind of flash tool ? Sorry for question just was wondering i use to flash unlocked version on my sprint v30 to have a bloat free phone
Click to expand...
Click to collapse
"Unlock" has different meanings in a dev forum. You mean carrier unlocked, SIM card unlocked. Not bootloader unlock.
U.S. Cellular has SIM card unlocked, carrier unlocked version. The "open market" version which will be released in early December will be both carrier unlocked and will be eligible for official bootloader unlock.
You basically want to convert your phone to another phone? Yes, with Samsung phones you can do something like that with Odin. I have a friend who bought UK Galaxy S8 and flashed Australian ROM (with Samsung Pay) through Odin. He's not rooted and doesn't want root.
There is an LG flash tool, to flash KDZ and TOT firmware:
http://www.droidviews.com/download-lg-flash-tool-to-flash-kdz-and-tot-firmwares/
I know with the V20 H910, once Dirty Santa was patched in order for someone to root their phone, they had to basically flash their phone to an older Freedom ROM, which was not yet patched, then install some engineering mode module, and then run Dirty Santa.
https://forum.xda-developers.com/showthread.php?t=3664500
So, some of what you're are asking can be done. But that ROM flashing was temporary and on some carriers you would lose signal. It was just a step to getting the bootloader unlocked and TWRP installed. Then the regular H910 ROM was reinstalled, and all signal functionally restored.
____
NOTE: this is a very simplified answer to the question. There are even "patched" versions of the tools to allow you to flash versions you aren't supposed to.
ChazzMatt said:
"Unlock" has different meanings in a dev forum. You mean carrier unlocked, SIM card unlocked. Not bootloader unlock.
U.S. Cellular has SIM card unlocked, carrier unlocked version. The "open market" version which will be released in early December will be both carrier unlocked and will be eligible for official bootloader unlock.
You basically want to convert your phone to another phone? Yes, with Samsung phones you can do something like that with Odin. I have a friend who bought UK Galaxy S8 and flashed Australian ROM (with Samsung Pay) through Odin. He's not rooted and doesn't want root.
There is an LG flash tool, to flash KDZ and TOT firmware:
http://www.**********.com/download-lg-flash-tool-to-flash-kdz-and-tot-firmwares/
I know with the V20 H910, once Dirty Santa was patched in order for someone to root their phone, they had to basically flash their phone to an older Freedom ROM, which was not yet patched, then install some engineering mode module, and then run Dirty Santa.
https://forum.xda-developers.com/showthread.php?t=3664500
So, some of what you're are asking can be done. But that ROM flashing was temporary and on some carriers you would lose signal. It was just a step to getting the bootloader unlocked and TWRP installed. Then the regular H910 ROM was reinstalled, and all signal functionally restored.
____
NOTE: this is a very simplified answer to the question. There are even "patched" versions of the tools to allow you to flash versions you aren't supposed to.
Click to expand...
Click to collapse
I have an LG V30 Model: H932PR. I would like to know your someone knows if there is any possibility of flashing the tmobile fimware on this device?
EddiePR said:
I have an LG V30 Model: H932PR. I would like to know your someone knows if there is any possibility of flashing the tmobile fimware on this device?
Click to expand...
Click to collapse
No, after the V20 LG has now added signature checks so you can't flash other variants to convert to another.
This was not widely known a few months ago. We thought that V20 trick would still work.
Too bad.
Sent from my official carrier unlocked LG V30+ US998

Categories

Resources