Why won't my Wi-Fi work on my iPhone?

It usually works well, but since I went to a hotel with some very bad connection, nothing will load properly, if at all.

Its an apple product. They don't work.

You must manually "disconnect" from the hotel network, even when it is 8.000 miles away, and reconnect to your network at home. The Iphone probably has set itself to connect to some unsecured network like it was in the hotel and at home tries to connect to another "open" network instead of your own one. Second possibility: you have static IPs at home and in the hotel the setup changed to "automatic reception". Then you must give it its old address.