Btw Lumia 720 user here, wanna ask any other user having problem accessing Secured Wifi Networks(saved or not).
It says No Internet Connection connect anyway?

Soft Reset dosent works but Hard Reset works for a while and it jumps back to the same problem. Confirm not problem with router and wifi cuz I have a tablet and laptop connected to it with no problem.

Trying Downgrading Back to Black from Cyan Dev Preview.