*#0000#
*#51x0# or
*#9999#
View###Serial###No:
*#92772689#
###SIM-LOCK###CHECKS:
#PW+1234567890+1# = GIVES PROVIDER-LOCK STATUS
#PW+1234567890+2# = GIVES NETWORK-LOCK STATUS
#PW+1234567890+3# = GIVES COUNTRY-LOCK STATUS
#PW+1234567890+4# = GIVES SIM-CARD-LOCK STATUS.
Enhanced###Full###Rate###(EFR):
*3370# to activate EFR.
#3370# to deactivate EFR
Half###Rate###Mode###HFR):
*4720# to activate HFR.
#4270# to deactivate HFR.
Default###Security###Code:
12345