So I bought a samsung tab 3 froM someone on Craigslist and was supprised when I found that I have an internet connection no matter what. I dont have a sim card, I dont have a plan set up, I reset to factory when I purchsed it and both wifi and tethering are turned off. I can also use bluetooth so all my other devices can run the internet off my tableg. Im not complaining but wondering how this is possible. A samsung tech couldn't even help me. Does anyone know the answer?