For fast 7 days i had big problem of battery backup in my lumia 920
i tired update to new version
wifi off,gps off,syn off,battery save on etc .. nothing worked
at last i changed the SIM card all of sudden my battery backup is great now
previous i used 3G SIM(BSNL network) now i changed the SIM to vodofone 2G
hope it may help for some people
i tired update to new version
wifi off,gps off,syn off,battery save on etc .. nothing worked
at last i changed the SIM card all of sudden my battery backup is great now
previous i used 3G SIM(BSNL network) now i changed the SIM to vodofone 2G
hope it may help for some people