Your Xiaomi 15 was scrolling along just fine, and now the 6.36-inch AMOLED panel sits there ignoring every tap, swipe, and long-press you throw at it. A frozen flagship is unnerving, but it almost never means a dead phone. A stuck app, a low-power black screen, a system software bug, or a single rogue download is usually behind it, and each has its own fix. Work through the steps below in order, starting with the gentlest one, because the early fixes solve most freezes without touching a single byte of your data.
Close the App That Locked Up Before You Do Anything Drastic
If the screen is still lit and only one app has gone unresponsive, you may not need to restart at all. Xiaomi's guidance is to try to escape the stuck app first, then close it from the recents view and relaunch it. A one-off freeze tied to a single app is normal and rarely a sign of something deeper.
- 1.Tap the Home button to return to the home screen; if you use full-screen gestures, slide up from the bottom instead.
- 2.Open the task button (recent tasks or task management) to bring up your running apps.
- 3.Close the frozen app from that list.
- 4.Reopen the app and use it again.
If the home gesture works and the phone responds everywhere except inside that one app, you have already found your culprit. Keep an eye on whether the same app freezes repeatedly, because that points you toward the Safe Mode test later in this guide.
Hold the Power Button to Force a Restart
When nothing on screen responds at all, a forced restart is the single most effective move. Xiaomi's official wording is to press and hold the Power button for more than 10 seconds to perform a forced restart. The phone will cut power and reboot on its own, and a normal restart like this does not erase any of your data.
It is worth knowing that the Xiaomi 15 has a sealed, non-removable 5240mAh battery behind its IP68 rating, so the old "pull the battery" trick simply does not apply here. Xiaomi's own crash and restart guidance reserves battery removal for products with removable batteries, which this phone is not. The 10-second Power hold is the equivalent reset for a sealed-battery device.
Plug It In and Wait If the Screen Stays Black
A phone that looks frozen may have quietly shut down from low power, especially if the screen is completely black and will not wake. Connect it to a charger and leave it for at least half an hour before you try anything else; the original adapter is best, though even a low-power source such as a computer USB port can get it going. When the battery is very low the display can stay dark at first, then show a charging indicator once it has taken on a little power.
After that wait, attempt the forced restart from the previous section. One safety note. If the phone feels hot and stays unresponsive while it is charging, unplug it and take it to an authorized service center rather than forcing it to power on.
Waking a Brand New Xiaomi 15 Out of the Box
A freshly unboxed Xiaomi 15 that refuses to turn on is usually not faulty. New units ship in an ultra battery-saver mode to prevent the battery from draining in transit, and that mode can leave the phone looking dead until you wake it with a specific button combination.
To bring it out of shipping mode, press and hold the Power button together with both the Volume Up and Volume Down buttons simultaneously for 40 seconds. If it still will not start after that, make sure it is sufficiently charged and try again once it has spent some time on the charger.
Install the Latest HyperOS Build to Clear Out System Bugs
Some freezes and crashes trace back to system bugs that a software update is designed to fix. Rather than waiting for the update to arrive on its own, you can pull the newest build manually once the phone is responsive again.
Open Settings > About phone, tap the Xiaomi HyperOS icon, tap the three-dot icon at the upper-right corner, then select Down latest package. Let the download and install finish, and the phone will restart into the updated build. Back up anything important before a major update so you are covered if the install is interrupted.
Use Safe Mode to Expose a Misbehaving App
If a third-party app keeps dragging the whole phone to a halt, Safe Mode is the clean way to confirm it. Safe Mode boots the Xiaomi 15 with only its built-in software loaded, so any installed app that has been causing trouble is temporarily switched off.
- 1.While the phone is turning on, long-press the Volume Down key.
- 2.Once it boots, look for the words "safe mode" in the lower-left corner; your third-party app icons will be hidden.
- 3.Use the phone normally for a while to see whether the freezing stops.
If the Xiaomi 15 stays stable in Safe Mode, an installed app is almost certainly the cause, so uninstall the most recent or most suspect one. To leave Safe Mode, simply restart the phone and it boots back to normal with all your apps available again.
Send Your Logs to Xiaomi Through Help and Feedback
For freezes that look software-related, Xiaomi recommends restarting the phone and then reporting the problem so the development team can investigate. The phone includes a built-in reporting tool for exactly this.
Find Help and Feedback in the system tools folder on your home screen, select the issue that matches what you are seeing, and submit your feedback. This attaches diagnostic logs that Xiaomi's developers can review while they work on a fix.
Factory Reset From Settings When the Freezes Keep Returning
If none of the steps above stick and the phone still locks up regularly, a factory reset is the next-to-last resort. This wipes everything, so it is critical to back up anything important first. Performing a factory reset will erase all data on your phone, so make sure to back up before proceeding.
- 1.Go to Settings.
- 2.Select About phone.
- 3.Tap Factory reset.
- 4.Tap Erase all data.
- 5.Select Back up or not as you prefer, then perform Factory reset.
A reset returns the software to a clean, factory-like state, which clears out corrupted settings and problem data that survived every earlier step.
Wipe From Recovery Mode or Book an After-Sales Visit
When the phone is so frozen that it is stuck on the boot logo or caught in a cycle of restarts and will not load the system at all, you cannot reach Settings, so Recovery Mode becomes the way in. This path also erases everything on the phone, so only use it when the device will not boot normally.
- 1.With the phone off, or during the cyclic restart, press and hold the Volume Up button and the Power button together to enter Recovery Mode.
- 2.Use the volume keys to highlight Clear data, then press the Power key to confirm.
- 3.Select Clear all data to complete the wipe.
Be clear about this. The Clear all data operation will clear all data on the phone. If Recovery Mode will not open, the wipe fails, or the Xiaomi 15 still will not work afterward, the freeze is likely a hardware issue. At that point Xiaomi recommends taking the phone to a nearby authorized after-sales service center for inspection.
Frequently Asked Questions
Will a force restart erase my data on the Xiaomi 15?
No. Holding the Power button for more than 10 seconds only reboots the phone and leaves your apps, photos, and settings untouched. Only the Clear all data step in Recovery Mode and the factory reset in Settings actually erase data.
Why won't my brand new Xiaomi 15 turn on at all?
A new unit ships in an ultra battery-saver mode to protect the battery during transit, which can make it look dead. Wake it by holding the Power button together with both Volume Up and Volume Down for 40 seconds, and charge it first if it still will not start.
Can I remove the Xiaomi 15 battery to fix a freeze?
No. The Xiaomi 15 has a sealed, non-removable battery behind its IP68 rating, so the battery cannot be pulled. Xiaomi reserves the battery-removal method for products with removable batteries; on this phone, the forced restart, with the Power button held for more than 10 seconds, takes its place.
What should I do if my Xiaomi 15 is stuck on the boot logo or keeps restarting?
Because you cannot reach Settings, enter Recovery Mode by holding the Volume Up button and the Power button together, then choose Clear data and Clear all data. This erases everything on the phone, so use it only when the device will not boot normally, and visit an authorized after-sales center if it still fails.
How do I get out of Safe Mode once I am done testing?
Just restart the phone. Safe Mode does not persist through a normal reboot, so once the Xiaomi 15 powers back up it returns to its standard state with all of your third-party apps available again.
