Finally. I've been trying to give facebook my number for a while. I've tried:

* Downloading Instagram without reading permissions.

* Downloading whatsapp.

* Downloading facebook chat.

* Having friends upload their entire contacts lists to FB, WA, IG, and chat.

* Using the website on mobile and directly putting in the data.

* Using any of their services to message friends my number which becomes a perfectly formatted tel link.

* tweeting zuck.

Facebook has still managed to not retain my number. I mean, I'm still waiting for them to phone me up. If you see this FB, call me maybe?