Iphone 6 plus crash
What should I do with my Iphone 6 plus because before I can play games and open apps with out crashing but now I can’t because the apps always crashed how to fix this?
iPhone 6 Plus, iOS 12
You can try a backup, and reset, and restore: Restore your iPhone, iPad, or iPod to factory settings - Apple Support
If the backup and reset and restore fails, you're headed for repair, or replacement with a newer or new iPhone.
An iPhone 6 Plus is old, cannot run current software, and a repair is unlikely to be a worthwhile investment.