Why is my iPhone 12 heating up post 17.4.1 update

Same issue here, after 17.4.1 my iPhone 14 pro max overheats, facetime calls get phone so hot it's like i played a game for 1h non stop

And no i did not have my phone plugged in while talking, and i have it on stand so there is more room for air to cool it down but no success.

Phone is unusable since the update the smallest thing overheats it.

It's not always the iOS update's fault!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.

Remember, the right question often leads to the solution!

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.

Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

same here with my 13 pro max. i only experienced this heating up from the backside yesterday after update 🫠