i am buying a used nexus tonight and had a few questions. being that it is used what should i make sure i check? i am also assuming all i have to do is switch my sim from my bionic to it? i know that ill have to manually transfer pics and so on. the phone is a little over 2 weeks old and has the reciept to show it to. the company bought them iphones since they designed a app for it to help their productivity. any suggestions?