Secret Codes For Nokia Handset

Here are some useful Nokia mobile hidden commands. Collect some additional information about your phone. 

Note :- Please be careful while using some system commands.

1. For Checking IMEI Number (Serial Number)   *#06#
2. Reset to Factory Setting (Default Settings)   *#7780#
3. To View mobile Software Version   *#0000#
4. SIM Clock Allowed Status   *#746025625#
5. Restrictions of your SIM   #pw+1234567890+1#
6. Bluetooth Device Address  *#2820#

7. For Secret Menu, Where you find out given information *#92702689# 

i. Displays Serial Number.
ii. Displays the Month and Year of Manufacture
iii. Displays (if there) the date where the phone was purchased (MMYY)
iv. Displays the date of the last repair - if found (0000)
v. Shows life timer of phone (time passes since last start)
8. Enhanced Full Rate Codec (EFR) activation. To Increase signal strength, better signal reception. It also help to use GPRS. Please note that Phone battery will drain faster though. *#3370#

9. (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.*#3370*  

10. Half Rate Codec activation.  *#4720#