Below are 6 ways you can try to fix iPhone freeze issue.
How to 1. Restart your frozen iPhone
Quickly press the "Volume Loud" button. Press the "Low Volume" button quickly, then press and hold the "Sleep / Wake" button until you see the Apple logo on your iPhone.
Method 2. Reset all iPhone settings
Reset Settings> General> Reset> Reset All Settings.
Method 3. Use professional iOS repair tool to fix frozen iPhone without data loss.
Open Joyoshare UltFix iOS Repair Tool and connect your iPhone to your computer. <Select repair mode <Download iOS firmware package <Fixed iPhone freeze issue
Method 4. Close the running app
Method 5. Download system monitor
A system check is needed to fully understand which apps are slowing down your iPhone. Just like the task manager on a computer. This helps you monitor iPhone performance such as memory usage, cache data, system logs, etc. Therefore, if your iPhone freezes, close or uninstall your frequently used apps.
Method 6 Downgrade iOS to an older one
If your iPhone starts to freeze after the upgrade Downgrade to an older version to see if it works smoothly. You can get support from Apple Support.