How can i update my software from ios 12.5.5 to Ios 15

ope224 wrote:

Unlock phone SIM

Your post is off-topic for this thread, but How is it locked?

• SIM locked to a carrier: Contact the carrier it is locked to and ask about their unlocking policy—>How to unlock your iPhone for use with a different carrier - Apple Support
• SIM PIN lock—>Contact your carrier for the SIM Personal Unlock Key (PUK) code

You cannot update an iPhone 6 higher than iOS version 12.5.5. This is because the iPhone 6 does not have the necessary hardware to run newer iOS version(s) efficiently. You will need a newer model iPhone to use higher iOS versions.

Axel F.

Blooddy Said:

"How can i update my software ios 12.5.5 to iOS15"

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For reference...

Updating an iPhone:

What to Update: Installed apps and the iOS.

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 - Apple Support

Unlock phone SIM