*#0*# testing mode*#06# view IMEI number*#0011# service mode signal status*#1234# display phones current firmware*#*#4636#*#* battery and other general settings like GSM/CDMA*#*#7594#*#* change the "Power" button action in your phone.*#*#7780#*#* Factory data soft reset*#*#8255#*#* Gtalk service monitor*#*#273283*255*663282*#*#* Opens a File copy screen where you can backup your media files*#*#1472365#*#* GPS test*#*#197328640#*#* service mode main menu*2767*3855# Factory Hard Reset to ROM firmware default settings*2767*2878# leave FactoryUSSD Codesnote: after entering the codes you need to hit the Dial buttonCode Description*#123# it tells you if you are within your local area or roaming*124# balance check (only works for phone carriers that enables this service, else you get UNKNOWN APPLICATION message