Decibel meter. Displays your signal strength in decibels, instead of bars. Hold "Alt" and press "N", "M", "L", "L" (repeat to reverse the effect).IMEI display.
Displays your device's international mobile equipment identity (IMEI - your serial number) on-screen... Also works from all other GSM handsets.Type "*", "#", "0", "6", "#" on the Home screen.Address Book file verification.Checks the data in your Address Book for inconsistencies.
Baca lanjut : http://goo.gl/kowg0
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