How can I update my iPhone 6s Plus to the latest iOS

The iPhone 6s Plus can be updated to iOS version 15.7.3 as of today.

----------

Make sure that your iPhone is setup to meet the following requirements before you attempt to update the iOS version over a Wi-Fi Network. Open Settings ➡️ General ➡️ Software Update: If there is an update available for your iPhone then it will be listed here. Follow the on-screen instructions to download and update your iPhone. 

• Your iPhone must have a fast Wi-Fi connection; you cannot update over cellular data or a cellular hotspot
• Ensure that you do not have a beta profile installed from a previous version
• The iPhone can not be in Low Power mode
• The battery state of charge must be above 50%
• Your iPhone must have at least 8GB or more free storage space
• Your iPhone cannot be connected through VPN
• You should leave the phone plugged in until it finishes updating, both to assure that it remains above 50% and to keep Wi-Fi enabled (Wi-Fi turns off when the phone sleeps if not connected to power).

Axel F.

iOS 15.7.3 is the "latest" of the iOS 15 versions.

The latest iOS version for iPhone 6S is: iOS 15.7.3

You can check your current iOS version here:

Settings > General > About

If you have an older software, you can update here:

First, connect your iPhone to WiFi, and a charger, and go to:

Settings > General > Software Update.

Richorlando Said:

"How can I update my iPhone 6s Plus to the latest iOS : How can I update my iPhone 6s Plus to the latest version"

-------

Updating an iPhone 6s Plus to iOS16:

You Can't. This is not an option. Your iPhone model(6s Plus) is incompatible with the latest version: iOS 16 - Apple. It can only go to iOS15.

For reference...

Updating your iPhone:

Try updating your iPhone first. Do so, through a computer. If you cannot update it, then it is likely out of date. As for getting the options back(if they existed), you'd have to perform a few things, perhaps leading to a reset. So, try the following, reporting if the update works...

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 iOS16 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

Your iPhone is too old and would not be compatible with the newer software updates.

Click ▶︎ iPhone compatibility with iOS 16 for the complete list.

The time has come:

Shop one-on-one with a Specialist at an Apple Store.

Click ▶︎ Reserve a Shopping Session. 🛒

You're right. Thanks for the information. It is fixed.