Android cell phone hacks?

you can Build a Wireless Oscilloscope for Android Phones. it will display visual images of varying electrical voltages over time. The Android oscilloscope Bluetooth project is attractive not only because of the oscilloscope software itself, but by the way it is combined with an Android phone through Bluetooth. The Android oscilloscope is undisputably a cheap, mobile device to process electronic test measurements on the move. once it is done ,you can ask your friend to test measure any electricity point for yourself, which he wouldnt know that his phone is capable of ,or you could send other people to him ,to get measurements of a electric point and he'll be embarrassed. another prank could become your SetCPU to modify the default CPU settings on an Android phone (Note: you may need root access). It can not only overclock the processor to speed up the phone, but it can also underclock it to save battery life. you can fiddle with his phone and surprise him with differing speeds. hacknmod is where you can get the detailed procedure also.