Hello , after doing everything my iPhone keeps disconnecting from any WiFi

Hello Phillipjc,

Thank you for using Apple Support Communities! I see that you haven't received an answer to your question. If you are able to provide additional information, then perhaps someone will be able to assist you. Some questions that might be helpful to answer are: 

What are the troubleshooting steps that you have already tried on your device?

Is your iPhone on the latest software update?

Can your device connect with Cellular service like browsing the internet using the Cellular data?

Have you tried resetting your network settings?

Cheers!

Hello Phillipjc,

Thank you for the update about your issue, I see you have tried multiple troubleshooting steps that we usually do for software troubleshooting.

You have mentioned erasing your iPhone and restoring it when performing this step, Have you restored from your backup or set it up as a new device?

Software issues travel with the backup in the Apps and Data, If you haven't tried that I would recommend restore it to factory settings and setting it up as new and see if the issue is still there.

If you can't update or restore your iPhone, iPad, or iPod touch.

If you have tried the previous step and the issue is still there I would recommend Contact Support they will be able to run diagnostics on your device and determine if there is a hardware issue within the device.

Take Care!

Hello Phillipjc,

When you follow the Contact Support  link it will show you all the support details available in your region.

Have a Nice Day!