Since updating to 18.1 my iPhone 16 keeps dropping to a Mobile connection even though Wi-Fi is on and the SSID is selected. You can see below that I have a Wi-Fi connection selected and connected but a 4G connection. The only way to get the Wi-Fi reconnected is to turn off Wi-Fi and turn it back on again and it reconnects.
When you install VPN it configures itself to the specific hardware, OS version and network that the device uses. If any of those change it can break the VPN. So any time you change any of these you may need to delete the VPN app and profile, restart your iPhone, iPad or Mac then add them back so it can configure itself to the new environment.
I will add that it probably isn’t any of your client VPNs, but if you have a VPN to access the public internet from an insecure location that is most likely the culprit.
Do you use VPN? If so, delete the VPN profile in Settings/General/VPN & Device Management/VPN. Don't just turn it off; delete the profile. If that fixes it, you can try reinstalling VPN.
Yes I have a dozen VPN connections to my clients. Deleting them is a pain, but also I've never had this issue on my iPhone 12 so why now and why should this fix a 4G/Wi-Fi issue.
iPhone 16 keeps dropping to mobile signal
