*#06#
This should return a 15 character number, which is the same as the one on the back of the phone. It is made up as follows.
123456 78 901234 5
12 = Manufacturer
44 = Motorola
49 = Nokia
3456 = Type Approval Code
0523 = 6110
3002 = 6150
78 = Final Assembly Code
07 = Germany
10 = Finland (all Nokia phones)
40 = UK
67 = USA
80 = China
81 = China
901234 = Serial Number
5 = Spare
Checking The Phone's Software Revision
*#0000#
This should return something like the following
For more information on this, see the software revisions page
Finding Out More Information
*#92702689#
The first screen displays the serial number
Then the month of Manufacture
Then the month of purchase(note: this cannot be changed once edited)
Then the month of last repair (should be 0000 if the phone has not been repaired)
Finally transmit user data. This is used to transfer all Calender, Profile and Caller Group details to another phone.
To exit this menu, you will have to switch the phone off and then on again
Activating Enhanced Full Rate (EFR)
*3370# activates EFR
#3370# deactivates EFR
Having it enabled will improve sound quality noticably, but decrease battery life by 5%
It will also only give some benefit when the service provider supports it.
Activating Half Rate (HFR)
*4720# activates HFR
#4720# deactivates HFR
Deactivating this increases battery life by about 30% but it dramatically reduces call quality.
It also only works on software revision 3.14.
Checking Whether Your SIM Supports Clock Stopping
*#746025625#
This checks to see whether your SIM card supports clock stopping. Older SIM cards do not and will substantially reduce
your battery life. In extreme cases, the effect of having a SIM which doesn't support clock stopping can reduce the standby
time from 7 to 2 days! So if you have a SIM which doesn't support clock stopping then it would be advisable to get it
changed.
Note: This only works with the very latest V5.24 revision Nokia 6110's.