I have a 15 pro and don’t think I experienced this. I know that photos on a Mac will run in the background, scanning your photos for faces and objects. That could be what happened, along with some other indexing. Surprised it occurred while on battery though. I wouldn’t worry about it unless it consistently happens.
this post was submitted on 22 Nov 2023
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iPhone
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I guess I’ll just keep an eye on it, but I may wait a few extra days before sending in my old phone / trade in, just in case.
The first couple days after you set up a new phone it’s always working really hard. Every app is running a re-sync and there’s a bunch of processing to create Siri indexes and stuff like that.
Usually on the first days of use while it is optimizing and indexing and remaking file structures and whatnot iPhone battery is trash and it heats up quite a bit. But after a few days it comes back to normal