When I originally was pluging my phone into my computer it would give me several options: Acess the sim card or charge only and others. I only wanted to charge at the time so I clicked on "Charge Only". Now I am guessing that is the default setting and can not figure out how to change it back so I can access my sim card with my computer. I have tried plugging the phone into several computers and none of them recognize that the phone is there. Any help would be greatly appreciated.