Neither, recommend you go to Ooma, free national, caller Id etc, etc but you get landline quality phone service. Plugs into your router, it's free except monthly tax of less then $5 in my area.
Yes, they prompt you to chose their pay service but no need unless you have a business, you just go into your account and change to free. Which is free except the monthly tax.
Stellar sound quality with Ooma, magic jack was a complete failure in our home.