Hello Mindaika,
To help resolve this issue, make sure your iPhone is updated to the latest version of iOS, which is currently iOS 16.0. Apple's updates contain software that is critical to the operation of your iPhone.
Also, make sure you have a current backup prior to updating your iPhone to secure your data. T
This guide shows you how to backup and update your iPhone:
Update your iPhone, iPad, or iPod touch wirelessly
1. Back up your device using iCloud or your computer.
2. Plug your device into power and connect to the internet with Wi-Fi.
3. Go to Settings > General, then tap Software Update.
4. Choose the software update that you want to install. You can choose to stay on iOS or iPadOS 15 and still get important security updates. Or you can choose the option to upgrade to iOS or iPadOS 16.
5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.
If the issue persists, we recommend you Contact Apple for support and service .
Have a great day!