I want to update to iOS with my data cause I have enough but it’s not acceptable

If you cannot install it over wifi try and update via a pc or Mac instead

Update your iPhone using a Mac with macOS Catalina or higher

On a Mac with macOS Catalina or higher, you will use the finder in order to upgrade your iPhone. Make sure to Back up your device before starting the upgrade process.

On a Mac with macOS Catalina or later, you will follow the following steps:

1. Open a finder window
2. Connect your device to your Mac via a lighting to usb A or a lightning to usb c cable
3. Select your device in the left sidebar of the finder window
4. click general, then click check for update
5. Click download and update.
6. If asked, enter your iPhone passcode

Update your iPhone via a Mac running macOS Mojave or earlier, or on a Windows PC

On macOS Mojave or earlier, or on a windows machine, we won't use the Finder to upgrade your iOS

Instead, we will use iTunes. Make sure to Back up your device before doing any update or upgrade to your phone.

1. Open iTunes
2. connect your device to the computer with an lightning to usb a or a lightning to usb c cable
3. Click device button in the iTunes toolbar
4. In the summary tab, click check for update
5. Click download and update, follow The on screen instructions
6. If asked, enter your iPhone passcode.

Then the answer is that it isn’t in the user’s ASC profile. It is taken from https://appleid.apple.com - Devices. ASC uses the phone’s serial number to populate the device line at the bottom of first post in a thread.

You need an iPhone 12 or iPhone 13 with 5G service to update over cellular data.

apple.center is correct- you need a 12 or 13. However, your iPhone may not be able to update any further anyway- an iPhone 6S can only be updated to iOS 12.5.5. Is your user profile correct?

Off topic question, where in user profile is displayed the phone model?

Actually, a 6S can be updated to 15.6. A 6 is limited to 12.5.5.

Settings/General/About-Model Name

Did you actually read the question and the context in which is placed?

Lawrence Finch wrote:

Actually, a 6S can be updated to 15.6. A 6 is limited to 12.5.5.

Whoops, sorry- I always mix up the 6S and 6 Plus ;)

Thanks!