Ios 27 unstable and running high load

It has been two weeks since I updated my iPhone 17 Pro to iOS 27, but I’m still experiencing battery drain issues. The phone gets hot very easily, and when I press the lock screen button, it sometimes lags and repeatedly triggers Siri.

I’ve already updated to iOS 27.0.1, but the same issues are still happening. Previously using ios 26 none of these happened to me.

Posted on Oct 4, 2026 7:24 AM

1 reply

Ingo2711

Level 10 (93,009 points)

Oct 4, 2026 10:46 PM in response to Helm_Angel

I guess you have already tried to force restart the iPhone after the latest iOS update?

...

Press and quickly release the volume up button.
Press and quickly release the volume down button.
Press and hold the side button.
When the Apple logo appears, release the side button.

...

copied from: Force restart iPhone - Apple Support

If this does not help, try to erase it and set it up as a new device, to rule out any defective data from the backup:

...

Go to Settings.
Tap General.
Tap Transfer or Reset [device].
Tap Erase All Content and Settings.
Tap Continue.
Choose to keep or delete your eSIM. If you erase your eSIM, you need to contact your carrier to reactivate your cellular plan.
Enter your device passcode.
Wait for your backup to finish.
Enter your Apple Account password.
Tap the done button ✔️ on your keyboard.
Wait for your device to reset.
When the process is complete, the Hello screen appears.

...

copied from: How to factory reset your iPhone, iPad, or iPod touch - Apple Support

If the iPhone is still showing issues after that, you should contact the official Apple Support about this, they can diagnose your iPhone online as a first step:

Contact Apple Support - Apple Support