Update

Rodney ~ You can update to iOS 15.5; see HERE. iOS 16 will be available in the Fall; see HERE. Learn how to update your iPhone to the latest version of iOS here:

Update your iPhone, iPad, or iPod touch

...found by searching Apple's Knowledge Base.

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Rodney ~ What model of iPhone is it?...

Settings > General > About > Model Name

And what version of iOS is it running?...

Settings > General > About > Software Version

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