While updating its show internet connection problem
Whil updating software it’s showing internet problem
iPhone 6 Plus, iOS 12
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See if anything here helps.
Connect to Wi-Fi on your iPhone, iPad, or iPod touch. *
Troubleshooting Wi-Fi issues in IOS. -
Have you tried resetting the router/modem?
Some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.
Try a restart.
Restart your iPhone, iPad, or iPod touch *
Try a forced restart.
Reset Device. -