Whole device flickering/glitching, lagging problem after Ios27 iphone14promax i need bug fix update

1 reply

Level 10 (233,174 points)

Sep 18, 2026 4:48 AM in response to mihir109

mihir109 wrote:

Whole device flickering/glitching, lagging problem after Ios27 iphone14promax i need bug fix update

If this was a bug, everyone who updated to iOS 27 would have an issue, but they don't. This forum would be flooded with complaints, but it's not.

You could have a couple issues with your phone:

The battery in your phone could be failing. Open Settings > Battery > Battery Health - if the health is 80% or less, the battery is failing and needs to be replaced at your Apple Store Genius Bar.
The screen or Motherboard could be failing, which didn't become apparent until the strain of being updated.

The first thing I'd do is Force Restart your iPhone (I do this after EVERY iOS update) --> Force restart iPhone - Apple Support

If that doesn't help, you'll need to schedule an appointment at your Apple Store Genius Bar for evaluation and service options, which would be your cost if your phone is not currently covered by an AppleCare+ Plan --> Genius Bar Reservation and Apple Support Options - Apple