My iPhone isn’t allowing me to get the new iOS update what should I do?

Hey there,

what happened when you you try to update your iPhone?

and what is the iOS version is running now on your iPhone?

See>>>Update your iPhone, iPad, or iPod touch - Apple Support

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if you have trouble with update See>>>If your iPhone, iPad, or iPod touch won't update - Apple Support

Currently the newest update for your phone is iOS 15.5. What version does it have?