Is your Apple iPhone 15 Plus turning off and on by itself? It can be really frustrating, especially when you’re using it for something important. The good thing is, this problem is more common than you think, and it’s usually easy to fix Apple iPhone 15 Plus reboot issues.
In this guide, we’ll help you understand why your iPhone is randomly restarting and what you can do to fix Apple iPhone 15 Plus reboot problems. If nothing works, we’ll also tell you the best way to get it repaired without any hassle.
Also Read: Damaged iPhone 15 Pro Rear Camera Lens? Here’s The Real Repair Cost!
Why Is Your iPhone 15 Plus Restarting Out of Nowhere?

Alright, first things first. Let’s look at the common reasons this happens. Usually, it’s not the hardware messing up, especially if your phone hasn’t been dropped or damaged. It’s more about software acting up.
A buggy app
Maybe you installed something new recently, or one of your apps updated and is clashing with your system. One bad app can cause the whole phone to crash and reboot.
iOS update issues
Sometimes even official updates can go a bit sideways. If your phone started acting weird after an update, that could be the reason.
Storage almost full
If your phone’s packed with photos, apps, and files, it might not have enough room to breathe. That can slow things down or cause unexpected reboots.
Something went wrong in the system
Corrupted system files or weird settings from a transfer or backup can cause your phone to behave oddly.
Not-so-trustworthy profiles or downloads
Every now and then, people accidentally install a shady profile or app that messes with iPhone settings.
Also Read: Top Water Resistant Phones To Buy!
Try These Quick Fixes First
Don’t worry, we’re not jumping into heavy stuff right away. Let’s start with a few simple things that usually sort the problem:
Restart the phone properly
It sounds basic, but a proper restart can work wonders. Hold the side button and volume up, slide to power off, and turn it back on.
Update iOS
Go to Settings → General → Software Update. If there’s an update, install it. Sometimes, Apple’s already patched the issue.
Check for app updates
Head to the App Store and update all your apps. A bug in one of them might be causing your iPhone to restart.
Free up space
Delete stuff you don’t use. Go to Settings → General → iPhone Storage and clear out old apps or big files.
Reset all settings
No, this won’t delete your data. It just puts your settings back to default. Go to Settings → General → Transfer or Reset iPhone → Reset → Reset All Settings.
Remove sketchy profiles
Go to Settings → General → VPN & Device Management. See anything that looks off? Just delete it.
Still seeing that annoying reboot? Don’t stress, we’ve got one more solid option to fix Apple iPhone 15 Plus reboot problem.
Also read: Don’t Overpay For iPhone Repair: Get Fair Price, Expert Service From Cashify!
When It’s Time to Call the Pros

If none of that worked, it might be something deeper. At this point, you can either keep guessing (and wasting time) or get your phone checked by people who fix Apple iPhone 15 Plus reboot issues like this all the time.
That’s where Cashify’s mobile repair service really comes in handy.
- You don’t have to go anywhere, we offer doorstep service.
- Repairs are done by trained techs who know iPhones inside out.
- You get clear pricing, no surprises.
- We handle both hardware checks and software fixes.
- You can book a repair online and just relax.
Whether it’s an iOS bug, a bad app, or a deeper issue, we’ll figure it out for you. And no, this won’t cost you a fortune or take forever.
If you’re looking specifically for Apple mobile repair, we’ve got a whole setup dedicated just for that. It’s honestly one of the easiest ways to sort out your iPhone repair issues without running to multiple places.
Also Read: Broken iPhone Screen? Get It Fixed By Cashify At A Cheaper Price!
Keep Reboots Away For Good
Once your phone is back to normal after you fix Apple iPhone 15 Plus reboot issues, there are a few simple habits you can follow to keep things running smoothly:
- Don’t install random apps from weird links
- Keep your iOS and apps updated
- Always keep at least 10–20% of storage free
- Avoid charging your phone overnight all the time
- Regularly restart your phone it helps more than you think
Also read: How Can Cashify Smart Repair Service Enhance Your Mobile Repair Experience?
Final Thoughts
Dealing with a phone that randomly restarts is frustrating, no doubt. But don’t overthink it. A lot of times, it’s a simple software issue that you can fix yourself. And if not, there’s always Cashify’s mobile phone repair service to get it sorted quickly.
You don’t have to wait in long queues, guess what’s wrong, or deal with shady service shops. Let the pros handle it while you chill. So yeah, if your iPhone 15 Plus is acting weird and you’re trying to fix Apple iPhone 15 Plus reboot issues, don’t panic. Try the easy stuff first, and if it doesn’t help, just book a phone repair with Cashify. You’ll be back to normal in no time.
Also read: Apple iPhones Eligible For iOS 26: Check Supported Devices (2025 Update)
If you’ve just bought a new phone and don’t know what to do with your old phone, then here’s your answer. Sell old mobile to Cashify and get the best price for it. If you are planning to buy a new phone, check out Cashify’s refurbished mobile phones. You can get your favourite phone at almost half price with six-month warranty, 15 days refund and free delivery.
