Q: Activate iMessage - Changing Phone Number

Thats the facts:

1. I change my Phone Number and my Country (to Colombia).
2. My new number is something like +57 (301) XXX XXXX.
3. iMessage doesn't activate, always is: "Waiting for activation".
4. I can use iMessage with my emails.
5. In "Phone Settings" my number is something like: +57 (301) XXX XXXX

What i need:

1. I want to be reached by iMessage at my New Phone Number: +57 (301) XXX XXXX.
2. I want to activate iMessage.

What i try before this post:

• http://www.igeeksblog.com/fix-imessage-waiting-for-activation/
• Link your iPhone number and Apple ID to use iMessage and FaceTime - Apple Support
• If you get an error when trying to activate iMessage or FaceTime - Apple Support
• Facetime/iMessage change Mobile number

My Phone is:

iPhone 6 - 64Gb - iOS 9.2

Actual Mobile Operator: Tigo (Colombia).

Previous Mobile Operator: T-Mobile.