The new iOS 27 update is available, and like last year with iOS 26, Apple admits it is going to take a toll on your iPhone. But rest assured, this bout of fever will only last a few days.
A resource-hungry indexing of internal resources
This is what an official support document regarding iPhone and iPad updates in general explains. In detail, this text explains that each update requires internal activity (data indexing, file downloads, app updates...) that makes your device work harder than usual.Temporary inconveniences depending on usage
This inevitably results in a battery that drains faster and a temporary overheating of the device. Apple nevertheless specifies that the intensity of these symptoms depends on how you use your device on a daily basis, and reminds that this unusual activity will only last a few days, while the device finishes all of its background processes.
The iOS 27 software update is already available for free download from the settings on all compatible iPhones.