*#2820# displays the bluetooth address of your device.It is important when your paired device or another bluetooth device could not display your device name.
*#62209526# displays the MAC address of your WLAN device.
*#92702689#displays the serial number,date of repair,date of manufacture and also the total talk time of your device.
*#2640#displays the security code in use.
*#4720# activates the half rate codec which uses lower quality sound but your talk time is increased to about 30%.
*#4720# deactivates the half rate codec function.
*3370# activates the enhanced full rate codec that uses high quality sound but reduce talk time to about 5%.
#3370# deactivates the enhanced full rate codec function.
*#06#displays the serial number of your phone.
*#73# resets phone timers and game scores.
*#0000# or *#9999# displays the model number,software version,the software released date and the compression type.
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