About internet calls
You can make and receive calls over the internet (network service). Internet call services may support calls between computers, between mobile phones, and between a Voice over Internet Protocol (VoIP) device and a traditional telephone.
Some internet call service providers allow free internet calls. For availability and connectivity costs, contact your internet call service provider.
The use of VoIP or other services may be restricted in some countries. For more information, contact your phone retailer, service provider, or local authorities.
To make or receive an internet call, you must be in the service area of a WLAN or 3G network, and be signed in to an internet call service.
When using the 3G network for making internet calls, check that your service provider supports internet calls in the 3G network. Flat-rate data plans are recommended to save costs.
If you do not have a flat-rate data plan from your service provider, to save data costs in your phone bill when making internet calls, use a WLAN.
See Make an internet call .