Although the new iPhone 15 Pro models have been met with strong reviews, one complaint is cropping up from some early adopters: The phones get too hot.

A growing number of consumers are reporting the overheating problem since the new iPhones launched on Sept. 22. The Pro versions adopt a titanitum casing for the first time, along with a more powerful A17 Pro chip. And they're running unusually warm, getting hot to the touch.

“I just got the IPhone 15 Pro today and it’s so hot I can’t even hold it for very long,” wrote one user in an official Apple support forum.

“I got the iPhone 15 Pro as well and it’s overheating when I’m on a phone call for like 8-10 minutes,” added another.

On social media, you can also find a few owners using temperature scanners to check the heat over their iPhone 15 Pro models. The videos on social media show the phones reaching 102 to as high as 107 degrees Fahrenheit.

“The natural titanium iPhone 15 Pro gets extremely hot, so much so that it becomes difficult to hold,” engineer Mohit Verma tweeted. “Furthermore, it heats up after just a 2-minute FaceTime call or when scrolling through reels for 8-10 minutes.”

We don't know why the iPhone 15 Pro is running hot. Users have tried to isolate the problem by shutting down apps and background services, but the phones continue to run warm. “Photos and videos make it super hot, charging makes it super hot, using it for YouTube and social media is also warm, like why is this so inefficiently heat-managed Apple?” wrote one user on Reddit.

Apple has not yet responded to a request for comment. But the complaints and growing headlines may force the company to respond.

In our review, we noted the iPhone 15 Pro Max became noticeably warm when playing games or completing a full power-up over charging. But otherwise, we had no problems with the device.