Drag the slide to power off Slider return off your iPhone.
Wait for a few seconds and then turn on your iPhone.
To turn on your iPhone, hold down the Side Button until the Apple logo appears.
Solution 2 : Update apps on your iPhone
First, Connect your iPhone to Wi-Fi.
Launch App Store on your iPhone.
Select”Today” tab at the bottom of the screen.
Tap on your Profile icon at the top right corner of the screen.
Tap “Update All” to update all apps on your iPhone.
Wait until the updating process is finished.
Solution 3 :Update ( ios) your iphone
Connect your iPhone to Wi-Fi.
Open Settings app on your iPhone.
Scroll down to “General” and tap it.
Tap “Software Update”.
Tap “Download and install” if an update is available. Wait until the downloading process is finished.
Once the download finishes, tap “Install Now”.
Solution 4 : sign out of Apple ID and sign in
Launch Settings app on your iPhone.
Tap on your name (Apple ID Banner).
Scroll down to “Sign out” and tap it.
Enter your Apple ID password and then tap “Turn off “.
Select the data that you want to keep a copy of on your iPhone and then tap “Sign Out”.
Again tap “Sign Out” to conform.
Then restart your iPhone.
Now sign into Apple ID.
Solution 5 : Reset all settings
Open Settings app on your iPhone.
Scroll down to “General” and tap it.
Scroll down to “Reset” and tap it.
Tap “Reset All Settings”.
Enter your Passcode and Screen Time Passcode.
Select “Reset All Settings” inthe pop-up box.
Again select “Reset All Settings” in the pop-up box to conform.
Wait until your iPhone restarts.
Solution 6 : disable and enable “ FaceTime” and iMessage
Open Settings app on your iPhone.
Scroll down to “Face Time” tap it.
Turn off “Face Time” and then go back to the Home Screen.
Launch Settings app on your iPhone.
Scroll down to “Message” and tap it.
Turn off “iMessage”.
Then Restart your iPhone.
Now turn o Face Time and iMessage on your iPhone.
Solution 7 : factory reset
Before trying this solution know one thing that pair to reset will erase all data from your iPhone. So before trying this solution make sure that you have a backup of your iPhone. If you don’t have a backup don’t try this solution. If you try this solution without taking backup you will lose all data from your iPhone.