iOS 8.3 Wifi Keeps dropping
i've never had any Wi-Fi or "Wi-fried" issues before with my phone but since upgrading to a 8.3 it keeps dropping my Internet constantly. I even had the cable people come out and replace the modem, and I've been using a brand new airport express which I bought 6 mo ago and never had a problem with it until upgrading to 8.3. The only way to get the Internet to turn back on once it goes out is to unplug the airport and plug it back in. This happens 15 times a day. I HATE it. My phone is basically useless. How do I fix this or revert back to an old iOS?
iPhone 6, iOS 8.3, Wifi won't work, keeps dropping!!!