How to download iOS 13.4

"How to download iOS 13.4"

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Updating an iPhone 6 Plus Past iOS 12:

You can't.  The iPhone will only install to iOS12. See here: Update your iPhone or iPad Software if you're Experiencing Issues with Location, Date, and Time - Apple Support. And, for the note, even if you could update, only the latest version will install: iOS 16.

For Future Reference...

Updating an iPhone:

Determining if an Update will Install:

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 iOS 16 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

Unfortunately, the iPhone 6 is not compatible with iOS 13 or higher.

You can't install Facebook on iOS 12.

Try using the web version.