How do I update my iPhone 13 Pro Max to iOS 15.7?

Abdulsamod11 Said:

"Yes: how to update my iPhone"

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Updating an iPhone 6s:

You can do so using WiFi or Ethernet on a computer.

Use my User Tip:  Update your iPhone Using a Computer - User Tip

Back Up First:

IMPORTANT: If you have an option to update, however, then be certain you backup your iPhone first. That way, you will have something to restore your iPhone from should anything go wrong with the update.

Settings > General > Software Update.