HelloWorld Postpaid Roaming List: Country Operator Afghanistan AWCC Afghanistan MTN Aircraft roaming service Aeromobile (Satelite) Aircraft Roaming service OnAir (Satelite) Albania Vodafone Algeria ATM Mobiles Algeria Djizzy Algeria Ooredoo Argentina CTI ( Claro ) Armenia Armen Tel (VimpelCom) Armenia K-Telecom (Viva Cell) Australia Optus Australia Telstra Austria Orange Austria Hutchison 3G  Azerbaijan Azercell Bahrain Batelco … Continue reading Country List