iPhone restarting and won't turn on WiFi - same issue on new phone when data transferred.

legs_eleven Said:

"My iPhone (8) started restarting every 5-10 minutes and won't turn on WiFi. Thinking it was a hardware issue, I bought a new phone (iPhone XS), but when I transferred the data from my old phone (restoring a recent backup), the new phone started doing the same thing, indicating that it is a software issue. [...]"

-------

Troubleshooting an iPhone in a Boot Loop:

I'd say the iPhone is stuck in a boot loop(because it was updating), or is simply frozen. So, if swiping down does not work, refer to the following... Try my User Tip: How to Fix an iPhone in a Boot Loop - User Tip

legs_eleven Said: [...]I have tried resetting the network settings to no avail. When I reset the new phone, this solved the issue. How can I fix this? I want to transfer the data to my new phone. The software has been updated to the latest (both 15.7 and 16.0 had the same issue). I believe the issue started when I backed up my phone to my computer via iTunes which included a software update."

-------

Troubleshooting iPhone WiFi:

Try these Thoughts:

A. Clear Temporary Internet Files:

If connecting is unsuccessful, try clearing out your Temporary Internet Files: History, Cache, and Cookies

Go Here: Clear your Safari Browser History and Set Up Content Blockers on your iPhone, iPad, or iPod touch - Apple Support

and...

B. Try manually restarting your iPhone:

1. Go To: Settings
2. Select: General
3. Scroll to: the Very Bottom
4. Select: Shut Down
5. Slide Finger: to the Right
6. Wait: 30 Seconds
7. Power One: the iPhone
8. Try this Once More

and...

C. Troubleshooting Connectivity:

Wi-Fi: If your iPhone won’t Connect to a Wi-Fi Network - Apple Support

and...

D. Reset your Network Settings:

• Go Here: If your iPhone, iPad, or iPod touch won't Connect to a Wi-Fi network - Apple Support
• Scroll To: Reset your Network Settings.