For any VoIP call, you need to have an Internet connection or a connection to a local network that in turn connects to the Internet.
Maka oku ọ bụla VoIP, ị ga-enwe njikọ Ịntanetị, ma ọ bụ njikọ na netwọk mpaghara nke na-ejikọta na Ịntanetị.