The iphone could not updated , An unknown error occured(9)

Hi RaviNordic

Welcome to the Apple Community

Wondering if this Apple Support article can help :

If you see error 9, 4005, 4013 or 4014 when you restore your iPhone, iPad or iPod touch – Apple Support

All the best :-)

"The iphone could not updated , An unknown error occured(9)"

-------

For reference...

Updating an iPhone:

A. What to Update:

Update Installed Apps along with the iOS.

B. Determining if an iOS Update will Install:

How to do so...

I. 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).

II. 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