If you ever plan on selling your mobile phone on eBay, do yourself a big favor and make sure you give it a good old factory reset. Wipe the memory card too while you’re at it. This advice comes from from the mobile and forensics experts Disklabs who purchased 50 handsets from eBay, admittedly a small sample size, only to discover that a whopping 50% of them still had some sort of personal data on their internal memory. Over 60% of the devices had phone numbers still left in the call log and 9 out of the 50 [18%] had pornographic images on them, most likely from those crazy late night sexting sessions that seem to be all the rage these days.