IMEI (Serial) Code:
*#06# .
Default Security Code:
12345.
Firmware Version:
*#0000#.*#51x0# or*#9999#.
To check the Serial No:
*#92772689#
*3370#
To activate Enhanced Full Rate (EFR).
#3370#
To deactivate EFR Half Rate Mode (HFR).
*4720#
To activate HFR.
#4270#
To deactivate HFR
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