Problem:

After connecting the phone to a public Wi-Fi network, there is a prompt indicating that the IP address is invalid on the authentication screen.

Cause:

This is because IP settings is selected for your phone.

Solution:

• Swipe down from the status bar on your phone, touch and hold the Wi-Fi icon to access the settings screen, touch and hold the Wi-Fi network in question, and choose Modify network > Show advanced options > IP settings > DHCP.

  

• Open Browser, touch More , go to Settings > More (or Advanced settings), and select Reset app preferences.