Start by comparing the available plans and click on Bring My Phone at:
https://www.visible.com/plans
You'll be asked to determine if your phone is compatible with Visible, and if so can proceed to order your desired plan, setup to port your phone number and proceed from there. Be sure to also checkout the current deal using promo code 35FOR6 which will give you $10 off on the Visible+ plan for the 6 month.
If uncertain, you can also signup for the free 15 day trial provided your phone is compatible with Visible. See:
https://www.visible.com/deals
