How do I keep my AT&T and have a Visible # on the same phone

[Mike305]

I want to have two numbers on my phone: Visible and AT&T #. They're sending me a Sim card that I don't want. Please help or attach a link to a message board where this was answered.

Thanks

[phoneman2021]

Hi, a few things.  1 what is the phone you are trying to use?  Lets start there.