(Potentially) Very helpful battery tip - Android Forums
4.0 ice cream sandwich - Change WCDMA to GSM automatically - Android Enthusiasts Stack Exchange
Issue 1284 - android - Switch between cell network types (2G/3G/LTE) automatically based on usage patterns - Android Open Source Project - Issue Tracker - Google Project Hosting
Looking for a widget that performs same function to : *#*#4636#*#* --> 'Phone Information' --> 'Set preferred network type'
Because above code is not working on my both phones SGS3 LTE (GT-i9305 and GT-i9305T)