How can I stop my iPhone 16 Plus from restarting every 5 minutes?

Have you done a Force Restart?

• Press and quickly release the Volume Up key
• Press and quickly release the Volume Down key
• Press and hold the side button until the Apple Logo appears. Ignore anything else on the screen during this time and it could take up to 15 seconds before you see the Apple Logo and can release the side button.

If that does not resolve the problem, then the next step is a Factory Reset and you will want to make sure you have a backup to restore your data after it has been reset.

• Force restart iPhone - Apple Support
• Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

If you have a computer, that would be the preferred method for the Factory Reset so iOS can be reloaded to your device.

Restore your iPhone, iPad, or iPod to factory settings using a computer - Apple Support

If that also fails to fix the problem, then you will want to schedule an appointment with Apple or contact them directly. You can also do this instead of the Factory Reset, but it is likely that is what they will do too.

• Genius Bar Reservation and Apple Support Options - Apple
• Contact Apple Support - Apple Support

Hello!

Try a forced restart if you haven’t already: Force restart iPhone - Apple Support

If the issue persists, you might want to take the device in to an Apple Store or Apple Authorized Service Provider (AASP) for diagnostics:

• Genius Bar Reservations: Genius Bar Reservation and Apple Support Options
• Locate Apple Stores & AASP’s: Find a Reseller 
• iPhone Service & Repair: iPhone Repair and Service - Apple Support

Have a great day!

"How can I stop my iPhone 16 Plus from restarting every 5 minutes?: Starting yesterday my iphone 16 plus keeps restarting every 5 minutes, and i did all the recomended steps. It's been restarted, the battery health is normal, and more but it keeps restarting"

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Did you just install an update?

Fixing a Boot Loop:

Your iPhone may be in a Boot Loop. This typically occurs when you go about installing an update, and it stalled while in the process. Use my User Tip: How to Fix an iPhone in a Boot Loop - User Tip