Hi,
The problem might be from various resons and in order to help, you need to provide more details. First, by network you refer to cellular or Wifi?
And regarding "no longer connecting", try downloading a diagnostic app, like Zinny and post a screen with the internet page (from Zinny app). Or, post the link with your phone stats ( from Zinny app, Phone vitals page, in the top right there is a share button). It will share only the phone settings and parameter status and nothing more.
Good luck