Today i am informing you some useful nokia codes.Some of will already aware about it.
Here are the codes
* to check the imei number on nokia just type- *#06#
* to check the phones software revision type- *#0000#
* to enter service menu type- *#92702689#
* to increase call quality type- *3370#
this increases call quality but reduces battery about 5%
to deactivate this service type- *3370# again
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