If asus eee pad transformer tf101 is already in your hand there two possibility the version of your eee pad transformer tablet that we guess. Transformer tablet supports wi fi only and the one that support both wi fi wlan and 3g networks need sim card from provider usually gsm the location of sim card slot can be seen at the keys and parts. China Nokia 1280 Invalid Sim The first thing youll need is a sim card for your desired carrier.