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NOKIA SECRET CODES - CELL PHONE MODEL 51XX series

NOKIA SECRET CODES FOR MOBILE PHONE | CELL PHONE MODEL 51XX SERIES..

For Nokia model 51xx, you can check Firmware version by entering this codes.
*#0000# or *#51x0#

Code for check IMEI                             
* # 06 #

Nokia Warranty Secret Codes.
Enter this code

   *#92702689#    (= *#war0anty#)

  After that scroll down through the information. If entering the above code requires a
  further 'warranty code' try entering the following:

   6232 (OK) : Month and year of manufacture
   7332 (OK) : Last repair date
   7832 (OK) : Purchase date (if previously set)
   9268 (OK) : Serial number
   37832 (OK) : Set purchase date (this can only be done once)
   87267 (OK) : Confirm transfer


Enhanced Full Rate (EFR) and Half Rate Mode (HFR) Code.

   *3370#  - to activate Enhanced Full Rate - Makes calls sound better, but   
                 decreases the battery life by about 5%.(I recommend this one)

   #3370#  - to deactivate Enhanced Full Rate 

   *4720#  - to activate Half Rate Mode - Drops call quality, but increases battery
                  life by about 30%.

   #4720#  - to deactivate Half Rate Mode

Tag : Nokia Secret Codes.

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