My phone (7 Plus) was fine this morning, but now won't connect to wi-fi. I have tried everything I can think of. Went to the Boost office (my new carrier after Virgin Mobile) and he couldn't get it fixed. I should be able to use cell service, but some of the programs and apps won't open and say No Connection, etc…… My home wifi is fine. All of our other devices work just fine. Any ideas on what I can try?