https://mydroidalerts.com/fix-mobile-network-state-disconnected-error/
If your phone keeps showing the message "Mobile network state disconnected" and you don't know what to do, don't worry! This article has 9 simple solutions to help you fix the problem. We gathered these solutions from people who faced the same issue and successfully resolved it.

We will guide you step-by-step on how to fix your AT&T, TFW, or Verizon phone so that it stays connected to the mobile network. Just follow the instructions, and soon your phone will be back to normal!