[imron]

> Technically, you can

Technically you can't

The Facebook family of companies will still receive and use this information for other purposes such as improving infrastructure and delivery systems, understanding how our services or theirs are used, securing systems, and fighting spam, abuse, or infringement activities.

[denzil_correa]

There are some places where your phone number will be used regardless of your choice - spam/abuse and there are some parts where it would not be used - targeted ads.