So I'm selling my 4s this evening. I have done the erase content and setting like 5 times. I have filled the whole phone with movies I own from iTunes to write over any personal info. I am going to remove the sim. I will erase the phone one last time. Am I forgetting to do anything. I'm leaving it on 5.1.1 in case they want to jail break it though it isn't jail broken. Is that a bad plan? Do I need to do anything else?