Now let's check them out»»»
*#06# [Displays device IMEI number]
*#1234# [Displays device current firmware]
*#*#1472365#*#* [GPS test settings]
*#*#197328640#*#* [Service mode main menu]
*#*#4636#*#* [Diagnostic and general settings mode]
*#0*# [General Test Mode]
*#0228# [ADC Reading]
*#0283# [Audio Loopback Control]
*#0289# [Melody Test Mode]
*#03# [NAND Flash S/N]
*#0588# [Proximity Sensor Test Mode]
*#0589# [Light Sensor Test Mode]
*#0673# [Audio Test Mode]
*#07# [Test History]
*#0782# [Real Time Clock Test]
*#0842# [Vibra Motor Test Mode]
*#12580*369# [SW & HW Info]
*#1575# [GPS Control Menu]
*#2263# [RF Band Selection]
*#232331# [Bluetooth Test Mode]
*#232337# [Bluetooth Address]
*#232338# [WLAN MAC Address]
*#232339# [WLAN Test Mode]
*#2663# [TSP / TSK firmware update]
*2767*3855# [Completely wipes your mobile, also it reinstalls the phones firmware]
*#*#273283*255*663282*#*#* [Quick backup to all your media files]
*#*#7378423#*#* [Sony service test menu]