do you have to have a contract with a phone company like cell phone? Or use Wifi if you have a router at home? I don't have in ipad, my parents overseas has one and they don't know how theirs are getting connected...... I want to be able to use my laptop to connect to the internet if i went visited them........ I know I want wifi there. They don't understand what wifi or router is... They said they already have a router in ipad... aghhhhh