IMEI number
*#06#

Software Version
*#0000#

1st Line - Software Version
2nd Line - Date of Software release
3rd Line - Phone Type.

Serial Number
*#92702689# 

1st Screen - Date of phone manufacture
2nd Screen - Serial #, IMEI
3rd Screen - Purchasing date
4th Screen - Last Repair Date. 

Enhanced Full Rate Mode

*3370# to activate Enhanced Full Rate Mode
[Call quality increases, battery life decreases!]

Newer versions of the phone software (probably from version 4.73 onwards, if I'm wrong someone correct me!) have got EFR activated as standard, so *3370# doesn't work. MTN South Africa supports this feature.

#3370# to deactivate Enhanced Full Rate Mode

Note:
After pressing these codes the phone will shut down and start up again with the service activated/deactivated.
 
 

*4720#
Activates Half Rate Mode over GSM (older versions of Nokia 61xx firmware only). 

Call quality drops, but increases battery life by about 30%...also network dependent

#4720#
De-activates Half Rate Mode over GSM (older versions of Nokia 61xx firmware only). 

Last Repair date
 

   *#92702689#
    or 
    *#92772689#

Then type 6232 and it shows you the warranty

Your business card on the display

• Change your currency (Menu 2-7-2-1) to your provider-symbol or anything you want (3 letters max.) 
• Set the phone-cost unit (Menu 2-7-2-1) to 1 
• Enter the cost-limit (Menu 2-7-1-1) like your phone-number 
• Change one profile (Menu 3-...-3) to your name 

 

*#sim0clock#

(*#746025625#)

Shows whether or not your sim card supports clock stopping. Not all versions of the software will report this.

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