Sony Ericsson Secret Codes

 *#06# =  IMEI (International Mobile Equipment Identity) Number
 >*<<*<* = Sony Ericsson Secret Menu (Software version, Service info, Service tests)
 0 then # = View last dialed numbers
 < 0 0 0 0> = Change to Default Theme / Language
 < * * < = SIMLOCK / Network information
 **04*0000*0000*0000# followed by on ‘Wrong Pin’ number = Opening phone without a SIM card
 On main menu type a number and press # =  Shortcut to SIM numbers
 904059 + > (to exit 3 + <) = Phone Test