How do I update my iPhone 6s Plus to iOS 15

Hello,

There are different ways to ensure the highest iOS that your device will support is installed on your device. For an iPhone 6S or 6S Plus that's iOS 15.7.7

Even though your profile information says you are running iOS 15, I do not automatically assume it is fully updated to the current version. This support article has instructions about updating an iPhone or iPad wirelessly --> Update your iPhone or iPad - Apple Support

You can also use Mac and PC computers to update system software:

Update iOS on iPhone - Apple Support

When updating, your device will update to the highest version currently available that it will support, or it will just say it is up to date (and can't go any higher) and won't install anything. If you want to run a higher system version than your current device will run, that you need to buy a newer device.

By using these instructions:--> Update your iPhone, iPad, or iPod touch

Specifically:

Assuming you're trying to update your device wirelessly, and bearing in mind that to perform such a procedure you need to connect your device to a reliable and fast Wifi Network with Internet access (no cellular data, unless you use a 5G network, no personal hotspot on your device, no VPN connections are admitted, no Low Power Mode enabled, and I suggest that you keep the device plugged into power during the whole update process), read this support article:--> If your iPhone, iPad or iPod touch won’t update (if you don't have a reliable and fast wifi network, "borrow" one from your relatives/friends/neighbors).

Also, make sure your device is NOT running a Beta operating system version. Should be this case, you need to remove it before installing any official iOS/iPadOS releases, as per these instructions:--> How to uninstall iOS or iPadOS beta software - Apple Support.

DO NOT forget to create a full backup of your device before updating its operating system, and keep in mind that, depending on the available storage on your device and/or on your wifi network speed, it might take 30-60 minutes to complete the entire update process.

If the issue persists or if the iOS version currently running on your device is very old (from your product list, it seems that the device is still running the prehistoric iOS 13), try to update it via computer (if you don't have a computer borrow one from your friends/neighbors, or ask for help at an Apple Store or Authorized Service Provider), then learn how to update your device manually if you're using a Mac with macOS Catalina or later, or if you're using a Mac with macOS Mojave or earlier or a Windows PC.

If you still get no help, contact Apple Support directly, using this link:--> Get Support

Regards

Giulio

mersharck wrote:

Please how can I upgrade to iOS 15

Can we assume you have read the detailed instructions posted above? If so, please explain which part of those instructions are causing issues for you.

Make sure that you have a good strong Wi-Fi Internet connection and the battery is fully charged.

Tap Settings > General > Software Update

What happens?

Please how can I upgrade to iOS 15

I want iOS 15

I want to update my IOS to 15 who can help me

The answer has already been posted.

How to update iOS 15.0 ?

The answers have already been provided.