Warning: This could be a nightmare.

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Apple's upcoming iOS 18 update is one of the most anticipated in some time, but it could be a nightmare for some iPhone users, writes daily Mail.

The upcoming update in September is one of the biggest in recent years and includes Apple Intelligence, the tech giant's artificial intelligence system.

Now a former Apple employee is warning that the update could cause the phone to lag even more and become slower.

– If you have a fine-working iPhone and don't care much about the new iOS, you shouldn't upgrade, urges former Apple employee Tyler Morgan, according to what he says. British newspaper.

This applies to slightly older iPhone models like the iPhone X, 11, 12, and 13. The reason is that iOS 18 uses more power, which may require a lot of effort for these models.

– The new update uses more power and will drain and weaken the battery very much, Morgan says.

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But if you still take the chance and regret it when the phone becomes slower, there are some possible solutions you can try.

The company iMyPhone It provides advice on iPhone issues and recommends a known solution: restarting the device.

This helps to preserve memory and improve battery life. Inform the companyIf that doesn't work, you can try creating better storage space by deleting old unused photos, videos, messages, and apps.