iMessage will not activate on new iPhone 11?

Greetings 00techer,

Welcome to Apple Support Communities!

From your post, it sounds like you're having trouble activating iMessage. We'd be happy to help with this.

We see that you have referenced our article, If you can’t turn on or sign in to iMessage or FaceTime

This is a great article. We want to emphasize the following steps:

We want to be sure your iPhone is running the latest version of iOS: Update your iPhone, iPad, or iPod touch

Make sure you're using an active SIM with international SMS send and receive ability.

If you're still not activated after a day, reach out to Apple Support: Contact Apple Support

Let us know if you have any questions.

Cheers!