SONY ERICSSON

Sony Ericsson Secret Menu: -> * <- <- *  <- *

(-> means press joystick, arrow keys or  jogdial to the right and <- means left.)

You'll see phone model, software info,  IMEI, configuration info, sim lock  status, REAL time clock, total call time  and text labels. 

You can also test your phones services  and hardware from this menu (main  display, camera, LED/illumination, Flash  LED, keyboard, earphone, speaker,  microphone, radio and vibrator tests)

IMEI Number: *#06#

Lockstatus: <- * * <-

Shortcut to last dialed numbers: 0#

Shortcut to sim numbers: On main menu  type a number and press #

If you change the language from default  to any other language, then it may be  difficult to switch to default language.  The shortcut is very simple. Just press <  0000 > . < stands for left arrow button  or joystick and > stands for right arrow  button or joystick.