Found an unsecured wifi that I could connect to from my office, and same problem... so it's not my internet
I don't have an i-phone but when my wife had a problem one of the things they suggested is check to make sure it isn't in airplane mode. If not, flip it onto airplane mode and then off again.
Tried that too.
I might have to do a factory reset if I can't resolve this soon... and I don't WANT to do that.