Using 5G while roaming

Europe
CountryOperator
Armenia
MTS (Viva) Armenia
Austria
Hutchison Drei (Orange),T-Mobile (Magenta Telekom)
Azerbaijan
Bakcell
Belgium
Base Company
Bulgaria
A1 (Mobiltel),Yettel(Telenor,Globul)
Croatia
T-Mobile(Croatian Telecom),A1 (VIPnet)
Cyprus
MTN(Areeba,Epic),Cytamobile-Vodafone
Czech Rep.
T-Mobile,Telefonica O2
Denmark
Telia
Estonia
Telia Eesti AS
Finland
Telia Finland Oyj
France
Orange,Bouygues Telecom,Free Mobile
Germany
Telefonica O2 (E-Plus),Telekom(T-Mobile)
Hungary
T-Mobile (Magyar Telekom),Yettel(Telenor,Pannon)
Ireland
Meteor
Italy
ILIAD Italia,Wind
Latvia
Latvijas Mobilais Telefons SIA (LMT) Telia
Lietuva
Omnitel
Luxembourg
Post
Malta
Vodafone (Epic)
Moldova
Orange(Voxtel)
Montenegro
MTEL
Norway
Telia Norge AS
Poland
T-Mobile,Orange,Play Mobile
Portugal
MEO(TMN)
Slovakia
T-Mobile
Slovenia
A1 (SI Mobil)
Sweden
Teliasonera
Switzerland
Swisscom,Sunrise
Turkey
Vodafone
United Kingdom
Virgin Media (Telefonica O2),Hutchison 3G UK
Australia
CountryOperator
Australia
Vodafone
Asia
CountryOperator
Israel
Pelephone
Japan
Docomo
Kazakhstan
Kazakhtelecom(K'Cell)
Kuwait
Wataniya Telecom (Ooredoo)
Malaysia
Digi Com
Saudi Arabia
Etihad Etisalat Company(Mobily),Zain
Thailand
True Move,TriNet,AWN(AIS)
America
CountryOperator
Brazil
Telefonica (Vivo Mg)
Canada
Bell Mobility,Telus
USA
AT&T(Cingular),T-Mobile