Learn Tips and Trick is going to share some awesome tricks and codes for the people who use Nokia mobiles. these all codes could be dangerous for your phone use these codes carefully if you will face any problem then feel free to comment here we will surely help you Lets get started ;)

*#7780#                
To restore the factory settings of mobile set
*#3283#                
To verify the set manufacturing date

*#746025625#  
To stop the sim clock
*#67705646#          
Use to delete the operator brand Clear the operator logo (3310 and 3330 only)
*#73#                
 Use to reset game scores and phone timers
*#0000#                  
Use to display the mobile software system version
*#06#
To show the IMEI variety of the mobile
*#92702689#        
To show the mobile warranty connected settings (Serial no, Made, Purchasing date, Repaired date, Life time).
*#7760#
To show the Production serial #
*#bta0#                  
Use to display Bluetooth mackintosh address
*#9999#                  
Use to display the mobile software system version
*#2640#                  
To show the mobile security code
*#7328748263373738#
Apply to resets the set default security code (Default security codeis 12345)
*#43#                    
To verify the call waiting status
*#2820#                  
 To verify the Bluetooth info
*#3370*                  
 (EFR) deactivation. Phone can automatically restart. Increase battery life by half-hour as a result of phone receives less signal from network.
*#delset#            
To delete the GPRS AND EMAIL settings
#pw+1234567890+1#
To show the lock status of mobile set
#pw+1234567890+4#
To show the lock status of your SIM
*#3925538#            
Delete the contents and code of wallet
*#3370#                    
Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better
signal reception. It conjointly facilitate if u wish to use GPRS and therefore the service isn't
responding or too slow. Phone battery can drain quicker although.
*#mac0wlan#          
Display the wireless local area network mac address (models with build-in Wi-fi radio)
*#21#                  
Allows you to check # that “All Calls” are diverted to
*#4720#                  
Activate [*fr1] Rate Codec – Your phone uses a lower quality sound however you must gain approx half-hour a lot of talk Time (Use same code to deactivate)
**21*Number#      
Activate “All Calls” amusing to the telephone number entered
**61* Number#
Turn on “No Reply” diverting to the telephone number entered
**67* Number#
Turn on “On Busy” diverting to the telephone number entered
*#61#                
Allows you to check # That “On No Reply” calls are entertained to
*#62#                
Allows you to check # that “Divert If out of reach (no service)” calls are diverted to
*#67#                
Allows you to check # that “On Busy Calls” are entertained to

Attention:: All these codes may not work on all Nokia Handsets +  use these secret codes carefully, as some of them are not reversible.