Service-Menu: “Dial” -> *#6984125*#
(for Vodafone-branded phones: *#3695147*#)
Master-Key for ‘Internals’ menu: *#9072641*#
(for Vodafone-branded phones: *#3971258*#)
Code for ‘Pre-config’ menu (operator code): *#73561*# (for Vodafone: *#83301*#)
Show IMEI: *#06#
Show software version: *#1234#
Test-Menu: *#0*#
Show realtime battery-infos: *#0228#
Master-Reset: *2767*3855#
Show bluetooth ID: *#232337#
Check Locks: *#7465625#
Disable Network Lock: #7465625*638*Code#
(works without any SIM card, unlock codes you can get for example at www.unlocking.com).