My iPhone does not let me update.

If your Apple mobile device won't update, read this support article --> If your iPhone or iPad won't update - Apple Support

Another, less common reason for not being able to update is if you were using a beta version of software. Refer to How to uninstall iOS or iPadOS beta software - Apple Support

jeromy194 wrote:

My phone does not let me update

What happens when you try?

What error messages are shown?

With an iPhone 11, you will need a Wi-Fi connection, and not cellular and not hotspot.