Question [Q] G2 Sprint LS980 PROBLEMS-No Network, Huge Battery Drain PLS HELP

Hello friends,

I have an unlocked Sprint LS980, which i was using for GSM India(I am from India). Two days ago phone shut down on its own i tried booting into download mode which made it to boot again.

now i am facing multiple problems First of all battery drains very fast (50%+ overnight without any use) which was normal before this incident. Secondly there is NO NETWORK Coverage, i thought it locked again and unlocked again. I have also tried flashing the stock rom and unlocking steps again, but to no use. Problems still exist. Is there anybody to help

Thank you