Please allow me to update my iPhone

gyasi99 Said:

"Please allow me to update my iPhone: pl update my iPhone"

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For reference...

Updating an iPhone:

How to do so...

A. Verify Compatibility:

Identify your iPhone model. The first thing that comes to mind in incompatibility being the culprit. So, confirm the model of your iPhone. If iPhone model is incompatible with iOS15 then it is because you iPhone does not meet the hardware requirements for this iOS version(s).

B. If Compatible...

1. 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

then...

2. Proceed with the Update:

Go Here:  Update your iPhone Using a Computer - User Tip

You need at least an iPhone 6s to update beyond iOS 12.4. An iPhone 6 and below just doesn't have the hardware to support the newer iOS.