Wifi not Connecting (Problem solved)

Several time you connect your android phone with wifi, but you are not getting signal or not connecting problems. Solutions of this problem is very simple Restart your android phone orenable airplane mode in android phone at least 1 minutes. Try again with your android phone for wifi.Increase your Android Phone Internet Speed by combining WIFI and Data

Marshmallow Wi-Fi connectivity issues

If you're getting spotty Wi-Fi connectivity on Android Marshmallow, there are a few things you can do. First, try toggling Airplane Mode on and off. If that doesn't work, turn off Wi-Fi, reboot your phone and turn it back on. Next, forget the connection and reconnect to it. Finally, go to Settings > Backup and reset > Network settings reset.

You might be surprised how much toggling Airplane Mode on and off can solve.