Software update issues via Wifi
iPhone 7 Plus, iOS 10.3.3
While connected to my home network, I cannot update my software on my iPhone. Every time I try the error message "Unable to Check for Software" comes up. This doesn't happen while connected to my cellular network, however the new update is over 2GB so must be downloaded while connected to WiFi.
I have reset Netowrk settings, reset my router, updated router firmware but nothing has worked so far. Does anyone have a solution?