Line2 supports the following devices:
iOS (iPhone, iPad): 13+
Android (Assorted Phones & Tablets): 9+
Windows (Desktop/Laptop): 10
Mac OSX (Desktop/Laptop): Mavericks+
Line2 will not work unless an active internet connection is available.
Once you are using a supported device with Line2 installed and have an active internet connection you should be able to place calls using VoIP.
Helpful Hint: VoIP is a term used to describe the technology that allows you to make voice calls using a broadband Internet connection instead of a regular phone line