Press and quickly release the volume up button, then quickly press and release the volume down button. Finally, press and hold the side button until you see the Apple logo appear on the screen. This force restart is the single most effective fix for an unresponsive iPhone 15 screen and works for most temporary software freezes.
I'd start with this one every time. It doesn't delete any of your data or settings, and it often resolves the issue in about 10 seconds. If your screen is black but the phone feels warm or you can hear notifications, this is almost certainly the step you need.
Charge Your iPhone 15 Properly
Plug your iPhone into its charger using a USB-C cable and a power adapter that supports at least 20W. The iPhone 15 was Apple's first model to switch from Lightning to USB-C, so make absolutely sure you're not trying to use an old Lightning cable by mistake.
Let it charge for at least 30 minutes. A completely drained battery can make the screen appear dead even when the phone is trying to turn on. If you have a MagSafe or Qi2 charger, try that as well to rule out a problem with the USB-C port.
Also, check for the 80% charge limit. Go to Settings > Battery > Battery Health & Charging and see if "80% Limit" is turned on. If it is, your phone will intentionally stop charging at 80%, which has confused some users into thinking it won't charge at all.
Check for and Remove Any Screen Protector or Case
Take off your case and any screen protector. A poorly fitted screen protector, especially a tempered glass one that's lifting at the edges, can interfere with the touch sensors and make the screen seem unresponsive.
Certain thick or metal cases can also cause overheating during charging, which triggers iOS to throttle performance or dim the screen dramatically for protection. With the case off, try the force restart sequence again.
Clean the screen itself with a soft, lint-free cloth. Oils, lotion, or moisture on your fingers or the display can sometimes disrupt touch sensitivity, making it feel like the screen isn't working.
Update iOS via a Computer
If your screen is partially working or you can get the phone to show a charging symbol, you might be able to update the software. Connect your iPhone 15 to a Mac or Windows PC with a USB-C cable.
On a Mac with macOS Catalina or later, open a Finder window. On a Windows PC or older Mac, open iTunes. Look for your iPhone, and if an update is available, you should see an option to "Update." This can fix bugs in iOS 26 that might be causing the screen to freeze.
This method is useful if you can't interact with the screen to go to Settings > General > Software Update yourself. The computer handles the installation process.
Put Your iPhone Into Recovery Mode and Restore
This is a more serious step that will erase your phone if you proceed, so it's a last resort. First, connect your iPhone 15 to your computer and open Finder or iTunes. Then, quickly press and release the volume up button, quickly press and release the volume down button, then immediately press and hold the side button.
Keep holding the side button even after the Apple logo appears. Wait until you see the recovery mode screen (a cable pointing to a computer icon) on your iPhone, then release the button. Your computer will detect a phone in recovery mode.
You'll be given the choice to "Update" or "Restore." Choose "Update" first. This will try to reinstall iOS without erasing your data. If the update fails or isn't available, then you may need to choose "Restore," which will install a fresh copy of iOS and delete everything on the phone.
Inspect the USB-C Port and Cable
Since this is a new port for iPhone users, it's worth a close look. Grab a flashlight and check the USB-C port on the bottom of your iPhone 15. Look for any lint, dust, or debris packed inside.
You can gently clean it out with a dry, soft-bristled brush or a can of compressed air. Don't use anything metal, as it can damage the delicate pins inside the port. A blocked port can prevent proper charging, leading to a dead battery and black screen.
Also, try a different USB-C cable and power adapter. Not all USB-C cables are made for data and power delivery. Use the one that came with your phone or a certified MFi (Made for iPhone) cable to be sure.
Check for Physical or Liquid Damage
Look closely at the screen for any new cracks, even hairline ones, that weren't there before. Internal damage from a drop can disconnect the display cable or damage the digitizer, which controls touch.
Think about whether the phone has been exposed to moisture. While the iPhone 15 is water-resistant, it's not waterproof. Significant liquid exposure can cause corrosion over time that leads to component failure, including an unresponsive screen.
If you see any signs of physical damage or suspect liquid got inside, the issue is likely hardware-related. The fixes above are primarily for software glitches, and physical damage typically requires a professional repair.
