My iOS is out of date but I don’t see where to get an update how can I get a iOS update?

What is the exact version listed here:

Settings > General > About > iOS Version

“My iOS is out of date but I don’t see where to get an update how can I get a iOS update?”

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Despite being solved, here are a few things to go by:

Update Using a Computer:

Updating an iPhone 12 Pro Max:

When it comes to updating an iPhone, aside from WiFi or a Computer, your only other option is to use Cellular. So, try update using Cellular. If of not success, try this once more, this time using a computer...

See my User Tips:

• Update your iPhone Using a Computer - User Tip
• Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip

Important:

Back Up First: Be sure create a back up your iPhone prior to performing an update, that way you have something to restore your iPhone from, should anything go wrong afterwards.

What iPhone do you have?

The iPhone 12 Pro Max shown in your tag line is compatible with the current version of iOS – iOS 18.3

About iOS 18 Updates - Apple Support

It is not compatible with Apple Intelligence.

If you have an older iPhone, it might not be compatible with iOS 18. For example, you can only update an iPhone 8, 8 Plus, or X as far as the latest release of iOS 16. Those iPhones are not compatible with iOS 17 and 18.

Tap Settings > General > Software Update

What is the exact message that appears here?

It doesn’t show any updates

Then, you are likely seeing a message that your iOS version is up to date.

This means that your phone is not qualified for any additional updates. If you want to run iOS 18, you will need a new phone.