here is how to remove the annoying startup sound for metropcs
first must b rooted no shit who doesnt kno that
next root exploror ,open that up
okay by now u should have the r/w permissions on
go to system/sounds/poweron and delete or replace the mp3 file and there you have it
if u need help rooting,or removing apps ect post back with questions and ill go into better detail on how to root and do what you want to do to ur lg optimus m
first must b rooted no shit who doesnt kno that
next root exploror ,open that up
okay by now u should have the r/w permissions on
go to system/sounds/poweron and delete or replace the mp3 file and there you have it
if u need help rooting,or removing apps ect post back with questions and ill go into better detail on how to root and do what you want to do to ur lg optimus m