WiFi turns off on its own - iPhone 6s IOS 9.1. I keep Wi-Fi assist off as it is eating my data plan and now I suffer lots of roaming charges
as the phone turns wi fi off whenever the screen goes off. To re-connect wifi I need to either restart the phone or go few times on / of on airplane mode.
It is like the phone gets crazy.... I fear this is related to wifi assist as the problems have started when IOS 9 was introduced.
iPhone 6s, iOS 9.1, WI FI PROBLEMS