Originally Posted by monkeypaw

What phone model are you using?
What OS?
What brand and model of router?
Also have you tried a connection at a friend's house or an available wifi such as at a cafe?

This was a problem with the 4.2 OS and with certain router models. Also there should be settings in the router that will help the connection. Could be either the router phone, both, router settings, or maybe just a poor quality internet connection.