Why should I always update my iPhone?
I need everything will be okay
[Re-Titled by Moderator]
iPhone 11, iOS 15
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Keep the iPhone updated to the latest iOS always and never Jailbreak. That's it.
iOS / iPadOS devices cannot be infected with Viruses / Malware / Spyware if it is updated to the latest iOS/iPadOS unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed them on your device or/and have Jailbroken.