can T-mobile firmware be installed on a sprint variant?

[nullspirit]

2 days ago I bought a refubrished lg g4.when I open the phone the boot animation is from T-mobile and in the about phone section it shows that the software version is H81121z but after opening the mainboard I see that the model number on the mainboard says LS991. I have a terrible battery life and want to install any other rom with good battery backup but which guides should I follow?
"Sprint" ones or "T-Mobile" ones?
also can anyone link a rom with good battery backup?
thanks

 

[TheMadScientist]

2 days ago I bought a refubrished lg g4.when I open the phone the boot animation is from T-mobile and in the about phone section it shows that the software version is H81121z but after opening the mainboard I see that the model number on the mainboard says LS991. I have a terrible battery life and want to install any other rom with good battery backup but which guides should I follow?
"Sprint" ones or "T-Mobile" ones?
also can anyone link a rom with good battery backup?
thanks

@steadfasterX may be able to help on this one I have been away from the G4 to long

 

[steadfasterX]

The mainboard model wins. You have a Frankenstein device.


Sent from my LG-H815 using XDA Labs

 

[nullspirit]

so the "T-mobile" boot animations and software version in the phone's about section is Altered?

 

[steadfasterX]

so the "T-mobile" boot animations and software version in the phone's about section is Altered?

Well that's just a system partition of T-Mobile. The bootloader stack is another story. If you install the system partition of a f500 it will show up as a f500 in boot animation and android settings.


Sent from my LG-H815 using XDA Labs

 

[nullspirit]

can I make my device a sprint one again?
and will I be able to use sim?
why did they installed t mobile system partition anyway?

 

[Moh281]

I have the problem
Are u solved this issue or any one have a solution ?

 

[sarry86]

Same problem here, how do I install the H81121z rom again and where can I get this?

 

[sarry86]

Anyone?.......