I'm in Europe and I can't connect to the European networks. What do I need to have to do that
You need to have pay per use international long distance and international voice roaming on to connect roaming. If you want data, you will also need international data roaming on. You can do this in self-serve. You can also do the same for roaming packages. Once that's done your phone should connect to a roaming partner, although I'd personally suggest having your phone unlocked and using a local sim, such as from Lycamobile.