Viber has announced that in the light of the US immigration ban it will be offering free calls to the countries affected by this. This includes free calls to mobile and landline in the following countries: Iran, Iraq, Libya, Somalia, Sudan, Syria, and Yemen. The offer will seemingly be available for the foreseeable future with no particular end date being announced by Viber. Source
Source: http://www.gsmarena.com/viber_offers_free_calls_to_countries_affected_by_us_immigration_ban-news-23068.php
