Wifi in ios 16.1

·      Reset the router to factory settings (menu or paper clip) – even if all other devices connect OK!

·      On iphone Settings, General, Transfer iphone or reset, reset, reset network settings

·      If you have a VPN you are strongly recommended to uninstall it and its profile in Settings, General, VPN and device management 

Here's some more steps you can try for Wi-Fi connection issues that may be helpful if your phone will not connect to WiFi

If your iPhone, iPad or iPod touch won't connect to a Wi-Fi network – Apple Support (UK)

Switching off the Location Services for the Networking & Wireless solved the problem to me.

Settings > Privacy > Location Services > System Services.

Then turn off the Networking & Wireless (or mb Wi-Fi Networking).

Akimbekov Said:

"Wifi in iOS 16.1:On my iPhone 12 pro, when I upgraded to ios 16.1, there are problems with connecting to Wi-Fi. When I connect to the network after a few seconds, it disconnects and reconnects again, how can I fix it?"

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Next Time you Install an Update...

Back Up First:

Take this as a learning experience, king to always create a backup, prior to installing this update? That way you can have something to, restore your iPhone from should anything go working afterwards.

LD150 Said:

"Whereat this is great advice I am lost as to the relevance to the O0’s problem. They cannot restore to previous state (iOS) from a backup“

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Mistype:

Should have ended with: should anything go wrong after an unsuccessful attempt.

Please report the bug and the remedy to Apple. They need to know

https://apple.com/feedback

Thank you

Whereas this is great advice I am lost as to the relevance to the OP's problem. They cannot restore to. previous state (iOS15) from a backup

In response to LD150, I followed the instructions to disconnect Norton VPN and it fixed the problem with the unstable Wifi, but I need VPN. What do I do now?

Why? do you live in Russia?

VPN and why never to use it (external link)

Click here >  Do not use VPN services

👍🙏

It was my VPN (Bark)

Thank you for the feedback, It so often is VPN.

Yes. I just deleted the VPN and reinstalled it and voila, everything worked.