The Full Form of IPHONE is‍ InternetPhone.

Internet telephone (sometimes referred to as Voice over Internet Protocol, or VoIP) is phone service that connects via the internet through a cable or DSL modem instead of a traditional landline.

To establish the connection, your provider sets up a small device, known as a telephony adapter, to your modem that translates your voice into data packets that are sent over the internet.

In addition to standard local and long-distance calling, some of the pros of internet calling include:

• Cost-effective – Many internet home phone plans start around $6/mo. and providers may offer bundle discounts for adding phone service to an internet or TV plan.
• More advanced features – Internet calling usually comes with your standard phone features, such as Caller ID and Call Waiting, but also includes more advanced features, such as Call Forwarding to a mobile phone, Caller ID on your TV, telemarketing blocking, voicemail transcription and more.
• Competitive international rate – Internet calling to other countries is often more affordable with some VoIP providers offering calls to Europe, for instance, for only pennies per minute.