Since I updated software to 15.1 last week my iPhone 8 has become virtually unusable. Many apps/features don't work including Facebook, maps, safari, Twitter, various other apps, and I can't load the App Store. What can I do?! I've tried turning device off/on several times, data off/on, closed apps and restarted, but problem remains. Please help!
iPhone 8
First try a Forced restart
https://support.apple.com/guide/iphone/force-restart-iphone-iph8903c3ee6/ios
If no better
Backup and restore (using the computer method preferably)
(1)How to back up your iPhone, iPad, and iPod touch – Apple Support
Remove your SIM PIN if it has one
(2) Restore your iPhone, iPad, or iPod to factory settings – Apple Support
(3) Restore your iPhone, iPad, or iPod touch from a backup
If the problem remains then arrange a repair
https://support.apple.com/iphone/repair/service
First try a Forced restart
https://support.apple.com/guide/iphone/force-restart-iphone-iph8903c3ee6/ios
If no better
Backup and restore (using the computer method preferably)
(1)How to back up your iPhone, iPad, and iPod touch – Apple Support
Remove your SIM PIN if it has one
(2) Restore your iPhone, iPad, or iPod to factory settings – Apple Support
(3) Restore your iPhone, iPad, or iPod touch from a backup
If the problem remains then arrange a repair
https://support.apple.com/iphone/repair/service
iphone 8 problems after ios 15 update
