Is your iPhone overheating and crashing since installing iOS 16.4.1? Here’s what to do

Have you noticed your iPhone overheating and possibly crashing since installing iOS 16.4.1, the latest update for the iPhone? Well, you’re not alone, because my iPhone has been doing exactly the same.

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I first noticed the problem a few hours after installing the update a little over a week ago. I observed that the iPhone got a lot warmer than usually when charging — especially when being charged on a wireless charger (and yes, this was a genuine Apple MagSafe wireless charger).

I also woke up a couple of mornings to find that my iPhone hadn’t fully charged. Initially I put this down to user error (a fancy way of saying I didn’t put it down on the charging pad properly), but ruled that out as I realized that it was happening several nights in a row.

I started to get reports from other users saying the same thing, and came across similar concerns online. It seems to mostly affect the iPhone 14 Pro and Pro Max, although I’ve come across reports from users with other handsets who say this is a problem.

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Clearly there was more to this than user error.

Then one night my iPhone locked up while on charge and was reluctant to come back to life the next morning. 

Here is a screenshot of the Battery screen in Settings on iOS showing it crashed after hitting 100% charge at about 3 am. What’s interesting is that this iPhone has optimized battery charging enabled which should have throttled charging at 80% until the morning. This did not seem to kick in.

I took a trip to a nearby Apple store to pay a visit to the Genius Bar. The friendly Genius ran diagnostics on the handset and gave it a clean bill of health, but told me that they’d seen increased reports of this problem in the past week or so.

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Since we’re still waiting for a new update to drop, I’ve been taking some steps to prevent this from happening again.

• Switch to wired charging: This doesn’t eliminate the overheating completely, but the charging generates less heat this way.
• Take off the case when charging: Cases prevent the iPhone from properly dissipating the heat that’s being generated.
• No overnight charging: Instead, I’m charging the iPhone a few times during the day.

Given the severity of the security issues that iOS 16.4.1 patched, I really can’t recommend skipping it, and hopefully a future update fixes this annoying bug sooner rather than later.