Viber

Viber

надежные site.

Freeware

Perhaps the best program for free calls on the phone or computer, excellent sound.

More than 200 million users.
Just set on the phone, enter your number, he sends himself an SMS, and is activated. No usernames, your username is your phone number, it simplifies adding users.
the Program scans your address book and adds to the list of those who have Viber. So you know whom to call.

you can Call not only Viber, but also to regular phones. The cost of calls to mobile and landline phones it is possible to learn here. Just enter the country and obtain information. Website in English, the country entered in English.