Sim card issue just scapegoat, most users have newly sim card average life of 1 to 2 years. Any i had same sim for roughly 17 months and just got a new card from tmobile and tested it with same result with gps off, 3g off wifi off, 2 hours of internet with t-mobile 2.5 speed, back light 1 no widget only shortcut and bookmark on the desktop maybe 10 mins of phone call and last only 8 hours. battery issue is killing this phone, we dont expect to spend 500+ on a phone couldnt last through out the day.