Показывает серийный номер телефона (IMEI)
*#06#

#8377466# - Показывает версию прошивки и дату изготовления.

On earlier version the above tip may not work, but you can try this one:
In the menu go to PHONE SETTINGS
Jog down to: FACTORY SETTINGS and CLICK ONCE
You will see a display “Factory Setting Yes No“ . Don't do anything with this display, leave it as it is.
Move the main switch of the phone briefly to the right (briefly means long enough to secure a short electric contact BUT short enough not to switch off the phone!)
Now you key in the following sequence:
# * 0 4 Will display info about sw (?)