Nokia useful codes

 

*#2820#-Bluetooth device add.
*#7780#-software reset and restore factory settings.
*#0000#-shows version.
*#06#-IMEI.
*#92702689#-warranty.
*#7760#-manufacturers code.
*#21#-call divert number.
*#2640#-security code/
*3370#-increase call quality/
*#8110#-software version/
*#7370#-Hard format/