Hi folks. I have recently changed my phone to a Nexus S 4g and am in the process of selling my old HTC Evo 4g phone. I was wondering what the best method is to completely format/wipe out the Evo 4g so that any of my personal information will not be available to the new owner? I know there is a 'factory reset' option for the phone, but what about the SD card that comes with the evo 4g? I know of the 'format SD card' option as well, but was wondering if there were any other advanced methods i should invest my time in. Thanks in advance folks.