How can I update my 6s?

The iPhone 6s can only be upgraded to the latest iOS 15 version, the built in hardware does not support any further iOS upgrades.

To upgrade to the latest iso 15 version, follow the steps mentioned in this article:

Update your iPhone or iPad - Apple Support

Or, if you are using a computer or Mac:

Update your iPhone, iPad, or iPod touch with iTunes - Apple Support

Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

Available iOS updates also depend on the supported, built in hardware for each iPhone model:

iOS 13 and iPadOS are compatible with these devices - Apple Support

iOS 14 and iPadOS are compatible with these devices - Apple Support

iOS 15 and iPadOS 15 are compatible with these devices - Apple Support

iOS 16 and iPadOS 16 are compatible with these devices - Apple Support

To update your iPhone 6s to the latest software version, you can follow these steps:

1. Connect to Wi-Fi: Ensure that your iPhone 6s is connected to a stable Wi-Fi network. Software updates are typically large in size and may consume a significant amount of mobile data if downloaded over a cellular connection.
2. Check Battery Level: Make sure your iPhone has sufficient battery power or connect it to a power source during the update process to prevent any interruptions due to low battery.
3. Open Settings: Locate the Settings app on your iPhone's home screen and tap on it to open.
4. Go to General: Scroll down in the Settings menu and tap on "General."
5. Software Update: In the General settings, you should see an option labeled "Software Update." Tap on it to access the software update section.
6. Check for Updates: Your iPhone will check for available updates. If a new software version is available, you will see a description of the update along with an "Install Now" button. Tap on "Install Now" to begin the update process.
7. Enter Passcode: If your iPhone is passcode-protected, you will need to enter your passcode to proceed with the update.
8. Follow on-screen prompts: Your iPhone will download the update first, and then proceed to install it. Follow the on-screen prompts to complete the installation.
9. Restart if necessary: After the update is installed, your iPhone may restart to finalize the update process. If it doesn't restart automatically, you can manually restart your device.

It's important to note that software updates can take some time to download and install, so it's recommended to have a stable internet connection and be patient throughout the process. Additionally, it's advisable to back up your iPhone before performing the update to ensure your data is secure.

If you encounter any issues during the update process or if your device is not compatible with the latest software version, you may want to consider contacting Apple Support or visiting an Apple Store for further assistance.

Best

[Link edited by Moderator]