Telekom Srbija - Mobile and fixed telecommunications services. Telenor - Mobile operator. Vip Mobile - Mobile operator. Trizma d.o.o. - Contact center service provider using telephone or other electronic means of communication. Orion Telekom - Serbian Internet Service Provider and Telco. ABA Tel Internet Services - Internet Services and VoIP. SBB Serbia broadband - Serbian cable operator and the only one that provides its services to customers in nearly 30 cities across Serbia. Cable broadband Internet, high-class side channels localized to the Serbian market. Starion - Provides its partners with solutions for both one-way SMS communication (bulk SMS) and two way SMS communication (premium SMS).