The second day does not work wi fi on the phone. xperia phone c. What to do?

Question

Android

A connection is made, data packets are sent and received (I looked at the router settings page), there is Internet on other devices (numerous laptops and phones (because I live in a hostel)). The phone connects to other networks and there is Internet.

Answer 1

receives dns? gateway specified?

Answer 2

First, reboot the access point.

Answer 3

reboot