Develop Bugs

[Q] Upgrade Software on Unlocked AT&T LG G3

I have searched and haven't found any info on how to do this, so please bear with me.
I recently purchased an AT&T LG G3 with the intention of unlocking it and putting it on T-Mobile. I unlocked it and it is now, for the most part, functioning. There are only a few issues: my MMS doesn't work at all and it has all of the AT&T stuff pre-installed. I wan't to download and install the base KitKat kernal on my phone, but I don't know where to get it and I don't want to risk bricking my phone.
So my questions for you are these:
1. Where can I get the base kernal for the LG G3?
2. Will installing that kernal cause any problems with my phone?
3. Are there any suggestions for something else I can do?
Thank you all!

mascaliente said:
I have searched and haven't found any info on how to do this, so please bear with me.
I recently purchased an AT&T LG G3 with the intention of unlocking it and putting it on T-Mobile. I unlocked it and it is now, for the most part, functioning. There are only a few issues: my MMS doesn't work at all and it has all of the AT&T stuff pre-installed. I wan't to download and install the base KitKat kernal on my phone, but I don't know where to get it and I don't want to risk bricking my phone.
So my questions for you are these:
1. Where can I get the base kernal for the LG G3?
2. Will installing that kernal cause any problems with my phone?
3. Are there any suggestions for something else I can do?
Thank you all!
Click to expand...
Click to collapse
How are you planning on flashing anything on a d850??

You cannot flash anything on the D850, because the bootloader is still locked. The kernel is stock so there is no need for change. Check your apn settings to see if there is a T-mobile apn, Google is your friend if it is not there.
Sent from my LG-D850

Sinterion said:
You cannot flash anything on the D850, because the bootloader is still locked. The kernel is stock so there is no need for change. Check your apn settings to see if there is a T-mobile apn, Google is your friend if it is not there.
Sent from my LG-D850
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Click to collapse
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
Click to expand...
Click to collapse
Your bootloader is locked. Sell your d850 and buy the d851

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
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Click to collapse
That is stock D850 from AT&T.
Unless you figured out a way to unlock the bootloader, which, someone asking these kinds of questions wouldn't be able to..

Milkshakes00 said:
That is stock D850 from AT&T.
Unless you figured out a way to unlock the bootloader, which, someone asking these kinds of questions wouldn't be able to..
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I'm new to this, but I'm not incompetent. I found this tutorial www dot androidrootz dot com/2014/07/how-to-unroot-lg-g3-all-variants dot html, my only question now is if I install the T-Mobile firmware will it in anyway damage the device?

Can't flash anything other than stock at&t firmware unless you wanna brick your device
Sent from my LG-D850

mascaliente said:
I'm new to this, but I'm not incompetent. I found this tutorial www dot androidrootz dot com/2014/07/how-to-unroot-lg-g3-all-variants dot html, my only question now is if I install the T-Mobile firmware will it in anyway damage the device?
Click to expand...
Click to collapse
I think what they are trying to tell you is:
1. only T-Mobile G3's have unlocked boot loaders
2. so only T-mobiles can be rom flashed
3. AT&T boot-loaders are locked, so you can not flash the rom.

Lol the irony. So he/she bought the at&t phone that comes with a locked boot loader (nothing to do with root) and wants to put it on T-Mobile that already have unlocked bootloader? Lmao... Read read and understand what you are asking before talking back to people that are trying to help you.

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
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Click to collapse
icon sets defined in build.prop not the bootloader. If you had bothered to look around here you would have seen at least two methods to change them back to stock. As for bloat, that is not bootloader either, just system apps.
mascaliente said:
I'm new to this, but I'm not incompetent.
Click to expand...
Click to collapse
Seems like you are very, very, very new. A bit less self confidence and more humility will help.
sonspot said:
Lol the irony. So he/she bought the at&t phone that comes with a locked boot loader (nothing to do with root) and wants to put it on T-Mobile that already have unlocked bootloader? Lmao... Read read and understand what you are asking before talking back to people that are trying to help you.
Click to expand...
Click to collapse
This

Unlocked an At&t SGS3 for use on Tmo

Hey guy I just unlocked an old SGS3 for AT&T SGH-I747. Now i plan on giving the phone to my mom for her to use since her current phone is a POS... how would i go about getting tmobile firmware on it for her without bricking. I know i have to root first and then Recovery then Rom, but is it safe and stable to run TMO rom on the att model of the S3. I just want to make sure that i go about this the rite way.
Thanks in advance

Will she be using T-Mobile data? The i747 does not natively support aws frequencies so that may be a problem. Voice calls would probably work.
You can't flash the t999 modem and bootloader to the i747 so forget about flashing a T-Mobile rom to i747.

Pray tell: How did you Un-Lock it?
I haven't been able to get past the debug screen?
Any info is appreciated, Thanks!
JosephJ85 said:
Hey guy I just unlocked an old SGS3 for AT&T SGH-I747. Now i plan on giving the phone to my mom for her to use since her current phone is a POS... how would i go about getting tmobile firmware on it for her without bricking. I know i have to root first and then Recovery then Rom, but is it safe and stable to run TMO rom on the att model of the S3. I just want to make sure that i go about this the rite way.
Thanks in advance
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Click to collapse

Flashing G925T Rom on G925A (Service now with T-Mobile)?

I think I know the answer is no. But I can't find the answer for sure.
I have had a G925A for about 2.5 years now got it at launch. After 10+ years of AT&T I left for T-Mobile. I might get the V30 when the price goes down or wait till the S9's come out. Want a phone with the new 600mhz band. What I am trying to figure out if there is any way to flash a G925T rom on my G925A. I know the drivers for the modem could be a issue. I also now the boot loader is locked with AT&T and it is not with T-Mobile.
Is there any way around this? Or am I just stuck with a AT&T stock rom?
Thanks for any confirmation.

Can all USA Galaxy S9 models be flashed to each other's firmware?

I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?

No, bootloaders are different, with the S7 there was an unbranded U firmware that was compatible with most of them, unlocked firmware will be that one for the S9, but no you cannot just flash different device firmwares to the wrong model

I was able to flash the ATT rom onto my Verizon S9. I got a VZ s9 from work but I'm on ATT. For the most part it's worked great, I had done the same thing previously with a Galaxy S7. I say for the most part b/c I am on here tonight to post a question myself about the fact that I'm getting a delay with MMS messages. I imagine it has something to do with the APNs I have setup, but I can't seem to figure it out.

toronado13 said:
I was able to flash the ATT rom onto my Verizon S9. I got a VZ s9 from work but I'm on ATT. For the most part it's worked great, I had done the same thing previously with a Galaxy S7. I say for the most part b/c I am on here tonight to post a question myself about the fact that I'm getting a delay with MMS messages. I imagine it has something to do with the APNs I have setup, but I can't seem to figure it out.
Click to expand...
Click to collapse
Did you have to flash to the U1 software first?

I do think that is what I ended up doing... tried to go directly first and it kept failing. Got fed up and decided to just try and put the bone stock rom on it, and that went on really easily.... so after using it like that a few days I tried to drop the ATT rom on it and it worked without issue.

SEALBoy said:
I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?
Click to expand...
Click to collapse
Yes, but you need to go to the u1 firmware 1st then to the other carrier firmware. Also make sure you avoid the newer firmwares with the new bootloader, as the unlocked model and certain carrier models don't have the new bootloader.

*Detection* said:
No, bootloaders are different, with the S7 there was an unbranded U firmware that was compatible with most of them, unlocked firmware will be that one for the S9, but no you cannot just flash different device firmwares to the wrong model
Click to expand...
Click to collapse
lolol
yes u can.. u can flash between U and U1 firmwares no problem..
normally ud b correct tho but since s8/s8+ it has been ok.. just cant flash 9600 or 9650 to a U or U1 device

elliwigy said:
lolol
yes u can.. u can flash between U and U1 firmwares no problem..
normally ud b correct tho but since s8/s8+ it has been ok.. just cant flash 9600 or 9650 to a U or U1 device
Click to expand...
Click to collapse
That'll be why I still thought that then, coming straight from the S7 > S9
Had many members flashing the wrong firmwares thinking they could do that and bricking their S7s / wondering why ODIN failed

*Detection* said:
That'll be why I still thought that then, coming straight from the S7 > S9
Had many members flashing the wrong firmwares thinking they could do that and bricking their S7s / wondering why ODIN failed
Click to expand...
Click to collapse
I tried downloading vzw firmware G960USQS3ARI6 to my unlocked sprint s9 and still not vzw flashed. want to do this so can have voice over LTE. Any other steps im missing? flash went through but still sprint

As soon as Firmware ver. 3 came out for the G960U1, I was able to flash it to my Sprint G960U and finally have VoLTE, WiFi calling and stable LTE for MetroPCS. Used samkey to unlock it from Sprint. My phone is actually performing much faster without all of Sprint's bloatware hogging my RAM and storage space. I can confirm that OTA updates still work the same...I received September's security patch (current) with no problems. Device is still official status and Knox hasn't been tripped.
A lot of people think you can just flash the carrier firmware of your choice and boom, it works...I had the same thought process....that's not the case. You have to make sure that there is a matching firmware version for the carrier you want to flash to, as well as make sure the G960U1 firmware version (the unlocked version of the S9's software you have to flash first before even carrier flashing) is the same version of what is installed on your phone now. It's easy ya'll......just READ lol.
I'm in love with my phone again thanks to XDA. ?
HAPPY FLASHING!

nickosarus2008 said:
As soon as Firmware ver. 3 came out for the G960U1, I was able to flash it to my Sprint G960U and finally have VoLTE, WiFi calling and stable LTE for MetroPCS. Used samkey to unlock it from Sprint. My phone is actually performing much faster without all of Sprint's bloatware hogging my RAM and storage space. I can confirm that OTA updates still work the same...I received September's security patch (current) with no problems. Device is still official status and Knox hasn't been tripped.
A lot of people think you can just flash the carrier firmware of your choice and boom, it works...I had the same thought process....that's not the case. You have to make sure that there is a matching firmware version for the carrier you want to flash to, as well as make sure the G960U1 firmware version (the unlocked version of the S9's software you have to flash first before even carrier flashing) is the same version of what is installed on your phone now. It's easy ya'll......just READ lol.
I'm in love with my phone again thanks to XDA.
HAPPY FLASHING!
Click to expand...
Click to collapse
Hi, I got one unlocked G960U1(G960U1UES3ARI1) and downloaded new fireware(G960U1UES3ARI1-SPR) from sammobile, but after flashed SPR ROM successfully, the info on the phone still shows XAA, anything I missed here? Thanks!

Curtis2018 said:
Hi, I got one unlocked G960U1(G960U1UES3ARI1) and downloaded new fireware(G960U1UES3ARI1-SPR) from sammobile, but after flashed SPR ROM successfully, the info on the phone still shows XAA, anything I missed here? Thanks!
Click to expand...
Click to collapse
Well first off, you have the unlocked phone. I don't. My G960U is originally from Sprint, so I'm not sure about carrier flashing regarding the G960U1. I thought it was supposed to provision itself after you put the sim in, and the associated carrier apps will download since it's the unlocked model...but I may be wrong...

SEALBoy said:
I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?
Click to expand...
Click to collapse
I know so many people have already answered your question from some saying No to others saying Yes but you need to Install U1 first and Bla Bla Bla.
I want to give you one specific answer: With S9 you can any Carriers firmware you wish or even Unlocked phone's firmware. You will never have any issue. And you don't ever need to flash U1 or something else before changing carrier firmware you can Flash from ATT S9 firmware to VZW S9 firmware without any issue. You can also flash from U to U1 which is from Carrier specific to Unbranded/Unlocked but only hiccup is original Odin will give you SHA-256 error, which is normal because you are flashing U1 firm to U device or vice versa. This error can easily be resolved by used Patched odin that disabled SHA-256 check. And trust me you will never have any issue.
You will never want to do this but I have gone as far as mix-matching U and U1 firmware together as well. Like flashing AP, BL and CP of U device but flashing CSC of U1 device. and it still works.

hey there, a little late to the party, having trouble with going from a Verizon to a Sprint, even by way of U1. I can't get any of them to work. And I've been told I have to go from VZW to U1 before I went to Sprint. Is that not the case? I'm having a hell of a time getting anything to flash, everything fails.
---------- Post added at 03:08 AM ---------- Previous post was at 02:57 AM ----------
ret4425 said:
hey there, a little late to the party, having trouble with going from a Verizon to a Sprint, even by way of U1. I can't get any of them to work. And I've been told I have to go from VZW to U1 before I went to Sprint. Is that not the case? I'm having a hell of a time getting anything to flash, everything fails.
Click to expand...
Click to collapse
well, I tried to load the Sprint image from the VZW, no dice. It said it passed, but upon reboot loaded up the old Big Red (even with the Sprint SIM in it).
Anyone have any ideas? This is driving me insane....

Sprint SM-A505U Odin flash T-mobile SM-A505U1

I am thinking about buying a SM-A505U that is locked to Sprint network. Anyone know if I can just use ODIN to flash SM-A505U1 T-mobile firmware to get it to work on T-mobile? I am hearing from other people that the Sprint variant currently does not work on T-Mobile out of box and that they are paying for carrier unlock services to get it to work. While I know carrier unlock is an option, I also reads somewhere that it may be possible to flash the t-mobile firmware and that would essentially turn it into a t-mobile phone and lock it to t-mobile (Which I am Okay with). Where as a carrier unlock service would allow me to use any sim.
Anyone know if this is feasible? Is there an actual hardware difference between the SM-505U and SM-505U1? Or is it purely software?

skim32 said:
I am thinking about buying a SM-A505U that is locked to Sprint network. Anyone know if I can just use ODIN to flash SM-A505U1 T-mobile firmware to get it to work on T-mobile? I am hearing from other people that the Sprint variant currently does not work on T-Mobile out of box and that they are paying for carrier unlock services to get it to work. While I know carrier unlock is an option, I also reads somewhere that it may be possible to flash the t-mobile firmware and that would essentially turn it into a t-mobile phone and lock it to t-mobile (Which I am Okay with). Where as a carrier unlock service would allow me to use any sim.
Anyone know if this is feasible? Is there an actual hardware difference between the SM-505U and SM-505U1? Or is it purely software?
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Click to collapse
i'm willing to try it .i have 2 a50 and 2 a10e i need to unlock from sprint and get them working on t-mobile.

Please let me know your findings.

skim32 said:
Please let me know your findings.
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Click to collapse
if you help me out with the steps i'll be happy to. i'm a little bit rusty when it comes to doing this it's been a very long time since i have done anything to a phone lol .

drinkhere said:
i'm willing to try it .i have 2 a50 and 2 a10e i need to unlock from sprint and get them working on t-mobile.
Click to expand...
Click to collapse
drinkhere said:
if you help me out with the steps i'll be happy to. i'm a little bit rusty when it comes to doing this it's been a very long time since i have done anything to a phone lol .
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Click to collapse
Here is the link to firmwares. I recommend using the oldest one to minimize any major baseband updates.
https://www.sammobile.com/samsung/galaxy-a50/firmware/SM-A505U1/TMB/
Here is a good tutorial on how to use Odin. YouTube can also be helpful .
https://samsungodin.com/how-to-use-odin/

So uh... It work?

skim32 said:
Here is the link to firmwares. I recommend using the oldest one to minimize any major baseband updates.
https://www.sammobile.com/samsung/galaxy-a50/firmware/SM-A505U1/TMB/
Here is a good tutorial on how to use Odin. YouTube can also be helpful .
https://samsungodin.com/how-to-use-odin/
Click to expand...
Click to collapse
Did this work at all? I have an a50 that I need to get my q-link to work on