hold 1 (dial voicemail)
*#06# (view IMEI)
*#*#8350#*#* (disable voice dialer logging)
*#*#8351#*#* (enable voice dialer logging)
*#*#4636#*#* (general information)
*#*#8255#*#* (gtalk service monitor)
*#*#225#*#* (calendar info)
**04*[old pin]*[new pin]*[new pin]# (change pin; do not enter [ and ])
**05*[PUK]*[new pin]*[new pin]# (unlock pin; do not enter [ and ])
**042*[old pin2]*[new pin2]*[new pin2]# (change pin2; do not enter [ and ])
**052*[PUK]*[new pin2]*[new pin2]# (unlock pin2; do not enter [ and ])
the following codes require that you hit dial:
*#61# (check redirection status)
##002# (cancel all redirections)
*43# (activate call waiting)
#43# (deactivate call waiting)
*#43# (show status of call waiting)
#31#[phone number] (hides your phone number from the receiver; you will be seen as "unknown"; do not enter [ and ])
*31#[phone number] (shows your phone number to the receiver)
the following codes are for call forwarding; must hit dial:
Call forwarding when busy:
**67*[phone number]# (forward to the given number; do not enter [ and ])
#67# (deactivate call forwarding)
##67# (erase call forwarding)
*#67# (request status for call forwarding)
Call forwarding when the phone is turned off or has no coverage:
**62*[phone number]# (forward to the given number; do not enter [ and ])
#62# (deactivate call forwarding)
##62# (erase call forwarding)
*#62# (request status for call forwarding)
Call forwarding for when you are not responding:
**61*[phone number]**x# (forward to the given number after x seconds; x=5,10,15,20,25,30; do not enter [ and ])
#61# (deactivate call forwarding)
##61# (erase call forwarding)
*#61# (request status for call forwarding)
Call forwarding for all conditions above:
*#004*[phone number]# (forward to the given number; do not enter [ and ])
#004# (deactivate call forwarding)
##004# (erase call forwarding)
*#004# (request status for call forwarding)
Always forward:
*#21*[phone number]# (always forward to the given number; do not enter [ and ])
#21# (deactivate call forwarding)
##21# (erase call forwarding)
*#21# (request status for call forwarding)
Erase all call diversions:
##002# (remove all call diversions)
From XDA
