*#06#
To disply IMEI (International
Mobile Equipment Identity) code of your device. Every Mobile device has a
unique IMEI code and this is very useful if you need to block your device when
it is stolen.
*#0000#
This willl display software version,
software version date, language set, Model No of your device.
*#2820#
This displays The Bluetooth MAC
address of your device.
*#62209526#
This displays Wireless MAC Address
of your device.
*#7370#
This code with reset the phone
memory. All data including phone contacts will be erased from your device. A
confirmation will be displayed before the function execute.
*#7780#
This code reset your device to its
factory settings. A confirmation massage will be displayed before the function
executed.
*#92702689#
This will display total device usage
time up this time.
*3370#
It will activate EFR(Enhanced Full
Rate). This will improve call quality but decreases battery life about 5%.
#3370#
This will deactivate EFR.
**21*DestinationNumber#
This will divert “All Calls”
to the phone number entered.
*#21#
This code allows you to check the
number that “All Calls” are diverted to.
##21#
This code disables “All
Calls”diverts.
**61*DestinationNumber#
This will divert “No Reply” calls to
the phone number entered .
*#61#
Allows you to check the number that
diverted on “No Reply”.
##61#
This code disables “No
Reply”diverts.
**62*DestinationNumber#
This will divert calls if your
phone is switched off or out of reach to the phone number entered .
*#62#
Allows you to check the number that
diverted on “divert if unreachable”.
##62#
This code disables “divert if
unreachble”diverts.
**67*DestinationNumber#
Turn on “On Busy” diverting to the
phone number entered .
*#67#
Allows you to check the number that
diverted on status “On busy”.
##67#
This code disables “On Busy”diverts.
##002#
This code will disable all of your
active call diverts.
There is a lot of other useful codes, but I
included the codes that I tested and found working on My Nokia E72. Please
mention other useful codes in comments, so I will try to include in this
post