*#06# to check the IMEI.
*#0000# To check the firmware version and date.
*#92702689# *#war0anty# To check the IMEI. The date when it was purchased, and the date when it was repaired.
*4720# (*hra0#)To activates the Half Rate.
#4720# (#hra0#)To deactivates Half Rate.
*3370# (*efr0#) To activates Enhanced Full Rate.
#3370# (#efr0#) To deactivates Enhanced Full Rate.
*#746085685# (*#sim0clock#) To check the SIM clock status.
*#7220# (*#pca0#) To activate the GPRS and Packet Common Control Channel(PCCCH) supports.
*#7230# (*#pcd0#) To deactivate the GPRS and Packet common control channel (PCCCH)supports.
*#7760# (*#ssn0#) To check the manufacturing serial number.
*#2820# (*#bta0#) To check the Bluetooth MAC address.
*#7370925538# (*#res0wallet#) Reset the mobile wallet.