Hi, I bought a HTC ONE X unlock through amazon.com I activated it with t-mobile. I can make call send text messeges, wifi works but the internet from tmobile doesnt work. One reason is I go to APN settings and there are no files saved. I tried creating a new one and put the settings when i tap save it doesnt save it. Plus a messege comes and says "No sim card found. Please insert a SIM card into the phone." Does anyone knows how to solve this problems. I would appritiate your help. Thank you.