apple watch phone line

David Pharr, Sr wrote:

I own an iPhone 5 and currently considering the purchase of an Apple Watch. To make phone calls from the apple watch will I need to purchase and additional phone line from my mobile carrier?

No, a second phone line is not required. But to make calls with the  Watch you will need to have your iPhone on and connected to the  Watch via bluetooth or have both devices on the same Wi-Fi network.