An enhanced version of the 3310 is the Nokia 3315 which has some additional features:
A picture editor to edit pictures for use in SMS Picture messaging & screensavers on the phone
Could use received ring tones as SMS tones
Fixed some of the bugs found in the 3310
Automatic keypad locking after specified time
Peanut-like inter-connected silicon keymat
Similar design to its successor (The Nokia 3410)
AMPS/D-AMPS-based versions (3320 and 3360)
The mobile phone features an MBus (Nokia) and FBus.
*#0000# - displays version number
*#92702689# (*#war0anty#) - displays usage in hrs:min:sec format
*3370# , #3370# - for enabling/disabling EFR quality voice mode.
*4720# , #4720# - for enabling/disabling HR quality voice mode.
*#746025625# (*#sim0clock#) - checks if the SIM clock stop can be allowed.