VoLTE Roaming is currently available in specific countries and with partner networks. You can use it in the Greece (with Cosmote ,Vodafone and Nova), the Spain (with Telefónica Móviles España), the UK (with 3UK and EE), the France (with Free Mobile) the Austria (with T-Mobile), the Slovakia (with Slovak Telecom and O2), the Czech Republic (with T-Mobile and O2), the Sweden (with Tele2 AB), the Lithouania (with UAB Tele2), the Latvia (with Tele2 SIA) the Estonia (with Tele2 Eesti Aktsiaselts) the Denmark (with HI3G ) the Tailand (with AIS Tailand), the Israel (with Pelephone Communication) and USA (with Verizon).