Update

jimoh129 Said:

"Update: I can’t find the latest software version in my iphone"

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For reference...

Updating an iPhone:

How to do so...

Determine if an Update will Install:

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:

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

An iPhone 6 Plus isn't capable of 13 or above.

(222541)

You might already have the "latest" software version for the iPhone 6 Plus. It is iOS 12.5.5.