| Afghanistan | MTN Afghanistan | MTN Afghanistan | + | + | 3G | Callback |
| Albania | Telekom Albania Sh.A | Telekom.al | + | + | 4G/3G | Direct call |
| Algeria | Optimum Telecom Algerie Spa | Djezzy | + | + | 3G | Callback |
| Andorra | Andorra Telecom | MOBILAND | + | + | 3G | Callback |
| Angola | Unitel Angola | UNITEL | + | + | | Callback |
| Angola | Movicel Telecomunicacoes S.A. | MOVICEL | + | + | 3G | Callback |
| Anguilla | Digicel | Digicel | + | + | | Callback |
| Anguilla | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Antigua and Barbuda | Digicel | Digicel | + | + | 3G | Callback |
| Antigua and Barbuda | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Argentina | Telefonica Moviles Argentina S.A. | Movistar | + | + | 4G/3G | Direct call |
| Armenia | Orange Armenia CJSC | Orange | + | + | 3G | Direct call |
| Aruba | Digicel | Digicel | + | + | 3G | Callback |
| Australia | Telstra Corporation Limited | Telstra | + | + | 4G/3G | Callback |
| Australia | Optus Pty Ltd | YES OPTUS | + | + | 4G/3G | direct call |
| Austria | A1 Telekom Austria | A1 | + | + | 4G/3G | Direct call |
| Azerbaijan | Azercell Telecom BM | AZERCELL GSM | + | + | 3G | Direct call |
| Bahamas | The Bahamas Telecommunications Company Ltd | BTC | + | + | 3G | Callback |
| Bahrain | VIVA Bahrain | VIVA | + | + | 3G | direct call |
| Bangladesh | GrameenPhone Ltd | GrameenPhone | + | + | | Callback |
| Barbados | Digicel | Digicel | + | + | 3G | Callback |
| Barbados | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Belarus | JLLC MOBILE TELESYSTEMS | MTS | + | + | 3G | Callback |
| Belarus | BELARUSSIAN TELECOMMUNICATIONS NETWORK | BeST | + | + | 3G | Callback |
| Belgium | Proximus | PROXIMUS | + | + | 4G/3G | Direct call |
| Belgium | Orange Belgium SA/NV | Orange Belgium | + | + | 4G/3G | Direct call |
| Belgium | Base Company NV/SA | BASE | + | + | 4G/3G | Direct call |
| Belize | Speednet-Wireless | Speednet | + | + | 4G/3G | Callback |
| Benin | Spacetel-Benin | MTN | + | + | | Callback |
| Bermuda | Digicel | Digicel | + | + | 3G | Callback |
| Bhutan | B-Mobile | B-Mobile | + | + | | Callback |
| Bolivia | Telefonica Celular De Bolivia S.A. | TELECEL BOLIVIA | + | + | | Callback |
| Bosnia and Herzegovina | BH Telecom | GSMBIH | + | + | 3G | Direct call |
| Botswana | MASCOM Wireless | MASCOM | + | + | 3G | Callback |
| Brazil | CLARO S.A | Claro | + | + | 3G | Callback |
| Brazil | TIM CELULAR S.A. | TIM Brasil | + | + | 3G | Callback |
| British Virgin Islands | Digicel | Digicel | + | + | | Callback |
| British Virgin Islands | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Brunei | DST Communications Sdn. Bhd. | DSTCom | + | + | 3G | Callback |
| Brunei | Progresif Cellular Sdn Bhd | Progresif | + | + | 3G | Callback |
| Bulgaria | A1 Bulgaria | A1 Bulgaria | + | + | 4G/3G | Direct call |
| Bulgaria | Bulgarian Telecommunications Company AD | vivacom | + | + | 4G/3G | Direct call |
| Burundi | VIETTEL BURUNDI S.A | Lumitel | + | + | 3G | Callback |
| Burkina Faso | Telmob Burkina Faso | Onatel | + | + | | Callback |
| Canada | Telus | TELUS | + | + | 4G/3G | Direct call |
| Canada | Bell Mobility Inc. | Bell Mobility | + | + | 4G/3G | Direct call |
| Canada | Rogers Wireless Inc | Rogers, 302 72, CAN72 | + | + | 4G/3G | Direct call |
| Cape Verde | CVMovel, S.A. | CVMOVEL | + | + | 3G | direct call |
| Cayman Islands | Digicel | Digicel | + | + | 3G | Callback |
| Cayman Islands | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Central African Republic | Orange Centrafrique | Orange Central African Republic | + | + | | Callback |
| Chad | Airtel TCHAD SA | Airtel | + | + | | Callback |
| Chile | Entel PCS Telecomunicaciones S.A | ENTEL TELEFONIA MOVIL | + | + | 3G | Callback |
| Chile | CLARO CHILE SA | CLARO CHILE | + | + | 3G | Callback |
| China | China Mobile | CHINA MOBILE | + | + | 4G | Callback |
| China | China Unicom | CHINA UNICOM GSM | + | + | 4G/3G | Callback |
| Colombia | Comunicacion Celular SA Comcel SA | Comcel | + | + | 3G | Callback |
| Congo Democratic Republic | Vodacom Congo (RDC) sprl | Vodacom Congo | + | + | 3G | Callback |
| Congo Democratic Republic | OASIS SPRL (Kinshasa DRC) | OASIS SPRL | + | + | | Callback |
| Congo Democratic Republic | Africell RDC S.A | Africell | + | + | 3G | Callback |
| Cook Islands | Telecom Cook Islands | Kokanet | + | + | 3G | Callback |
| Costa Rica | I.C.E. (Instituto Costarricense de Electricidad) | I.C.E. | + | + | 3G | Callback |
| Costa Rica | CLARO CR Telecomunicaciones S.A | CLARO | + | + | 3G | Callback |
| Cote d'Ivoire | Atlantique Telecom Cote d'Ivoire | MOOV | + | + | | Callback |
| Cote d'Ivoire | Orange CI | Orange CI | + | + | | Callback |
| Croatia | VIPnet d.o.o. | VIP-NET | + | + | 4G/3G | Direct call |
| Cuba | Empresa de Telecommunicaciones de Cuba, SA (ETECSA) | ETECSA | + | + | 3G | Callback |
| Cyprus | Cyprus Telecommunications Auth | Cytamobile-Vodafone | + | + | 4G/3G | Direct call |
| Czech Republic | O2 Czech Republic a.s. | O2 | + | + | 4G/3G | Direct call |
| Czech Republic | Vodafone Czech Republic a.s. | Vodafone | + | + | 3G | Direct call |
| Denmark | Telia Danmark | TELIA DK | + | + | 4G/3G | Direct call |
| Djibouti | Djibouti Telecom SA | Evatis | + | + | 3G | Callback |
| Dominica | Digicel | Digicel | + | + | | Callback |
| Dominica | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Dominican Republic | Claro Codetel | CLARO GSM | + | + | 3G | Callback |
| Ecuador | OTECEL S.A. | MOVISTAR | + | + | 4G/3G | Callback |
| Egypt | VODAFONE EGYPT TELECOMMUNICATIONS S.A.E | Vodafone | + | + | 3G | Callback |
| El Salvador | CTE TELECOM PERSONAL (Claro El Salvador) | CLARO | + | + | 3G | Callback |
| El Salvador | DIGICEL, S.A. de C.V. | Digicel | + | + | 3G | Callback |
| Equatorial Guinea | Orange Equatorial Guinea | Orange GQ | + | + | | Callback |
| Estonia | EMT AS | EMT | + | + | 3G | Direct call |
| Faroe Islands | Faroese Telecom | Faroese Telecom GSM | + | + | 4G/3G | Direct call |
| Falkland Islands | Sure South Atlantic Ltd | Sure | + | + | | Callback |
| Finland | TeliaSonera Finland Oyj | Sonera | + | + | 4G/3G | Direct call |
| France | Bouygues Telecom | BOUYGUES TELECOM | + | + | 4G/3G | Direct call |
| France | Orange France | Orange F | + | + | 4G/3G | Direct call |
| Gabon | Libertis | LIBERTIS | + | + | 3G | Callback |
| Gambia | Africell (Gambia) Ltd. | AFRICELL | + | + | 3G | Callback |
| Gambia | Comium Gambia Ltd | Comium Gambia | + | + | | Callback |
| Georgia | Geocell | GEOCELL | + | + | 4G/3G | Direct call |
| Georgia | MagtiCom Ltd | MagtiCom | + | + | 3G | direct call |
| Germany | Telefonica Germany | O2 (Germany) GmbH&Co. OHG | + | + | 3G | Direct call |
| Ghana | Vodafone Ghana | ONEtouch | + | + | 3G | Callback |
| Gibraltar | Gibraltar Telecommunications Int. Ltd | GIBTEL | + | + | 3G | Direct call |
| Greece | WIND Hellas Telecommunications S.A | WIND | + | + | 4G/3G | Callback |
| Greece | Vodafone-Panafon | Vodafone | + | + | 3G | Callback |
| Greenland | TELE Greenland A/S | Tele Greenland | + | + | 3G | Callback |
| Grenada | Digicel | Digicel | + | + | | Callback |
| Grenada | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Guatemala | Telecomunicaciones De Guatemala, S.A. (TELGUA) | CLARO | + | + | 3G | Direct call |
| Guinea | Orange Guinee SA | Orange Guinee | + | + | | Callback |
| Guinea | Cellcom Guinee S.A. | Cellcom Guinee | + | + | | Callback |
| Guinea-Bissau | MTN Guinea Bissau | MTN | + | + | | Callback |
| Guyana | Digicel Guyana, U-Mobile (Cellular) Inc. | Digicel Guyana | + | + | | Callback |
| Haiti | Digicel | Digicel | + | + | 3G | Callback |
| Honduras | SERCOM HONDURAS S.A de C.V. | CLARO GSM | + | + | 3G | Callback |
| Hong Kong | Hong Kong Telecommunications (HKT) Limited | CSL | + | + | 4G/3G | Callback |
| Hong Kong | SMARTONEVODAFONE | SMARTONEVODAFONE | + | + | 3G | Callback |
| Hong Kong | Hutchison Telecom (HK) Ltd | Hutchison Telecom | + | + | 3G | Callback |
| Hungary | Vodafone Hungary Ltd | VODAFONE | + | + | 3G | Callback |
| Iceland | Nova ehf. | NOVA | + | + | 4G/3G | Direct call |
| Iceland | Siminn hf | Siminn hf | + | + | 4G/3G | Direct call |
| Iceland | EIR | eir | + | + | 4G/3G | Direct call |
| India | Bharti Airtel Ltd (Andhra Pradesh, Karnataka, Chennai) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel Ltd (Calcutta, Madhya Pradesh, Haryana) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel Ltd (Gujarat, Mumbai, Uttar Pradesh West) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel Ltd (Kerala, Maharashtra&Goa, Himachal Pradesh) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel Ltd (New Dehli, Tamilnadu, Punjab) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel (UP East, Orissa, Bihar, West Bengal) | Bharti Airtel | + | + | 4G/3G | Callback |
| India | Bharti Airtel (Rajasthan, North East, Assam) | Bharti Airtel | + | + | 4G/3G | Callback |
| Indonesia | PT Indonesian Satellite Corporation | Indosat Ooredoo | + | + | 3G | Direct call |
| Iran | Mobile Company of Iran | MCI | + | + | | Callback |
| Iraq | Zain Iraq | ZAIN-IQ | + | + | 3G | Callback |
| Iraq | Zain Iraq | ZAIN-IQ | + | + | 3G | Callback |
| Iraq | KOREK TELECOM | KOREK | + | + | 3G | Callback |
| Ireland | eir | eir | + | + | 4G/3G | Direct call |
| Ireland | Vodafone Ireland Ltd. | Vodafone | + | + | 3G | Direct call |
| Israel | Partner Communications Company Ltd | Partner | + | + | 4G/3G | Callback |
| Italy | Telecom Italia S.p.A. | TIM | + | + | 4G/3G | Direct call |
| Italy | Wind Telecomunicazioni SpA | Wind Telecomunicazioni SpA | + | + | 4G/3G | Direct call |
| Jamaica | Digicel | Digicel | + | + | 3G | Callback |
| Jamaica | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Japan | NTT DoCoMo, Inc. | NTT DOCOMO | + | + | 4G/3G | Callback |
| Jordan | Jordan Mobile Telephone Services, Zain JO | ZAIN-JR | + | + | 3G | Callback |
| Jordan | Orange Jordan | Orange | + | + | 4G/3G | direct call |
| Kazakhstan | Kcell JSC | K'CELL | + | + | 3G | Callback |
| Kazakhstan | Mobile Telecom Service LLP | NEO | + | + | | Callback |
| Kazakhstan | Kar-Tel LLP | Beeline | + | + | 3G | Callback |
| Kenya | Airtel (Celtel) Kenya Limited. | Airtel Kenya | + | + | | Callback |
| Kenya | Telkom Kenya Limited | Telkom Kenya | + | + | 3G | Callback |
| South Korea | SK Telecom Co. Ltd | SK Telecom | + | + | 4G/3G | Callback |
| Kuwait | National Mobile Telecommunications Co. | Ooredoo | + | + | 4G/3G | Callback |
| Kyrgyzstan | Sky Mobile LLC | Bitel | + | + | 3G | Callback |
| Kyrgyzstan | NUR Telecom LLC | O! | + | + | 3G | Callback |
| Kyrgyzstan | Alfa Telecom CJSC | MegaCom | + | + | 3G | Callback |
| Laos | Star Telecom | LAT | + | + | 3G | Callback |
| Laos | VimpelCom Lao, Ltd | Beeline | + | + | 3G | Callback |
| Latvia | Latvias Mobilais Telefons. | LMT GSM | + | + | 4G | Direct call |
| Lebanon | MIC 1 | Alfa | + | + | | Callback |
| Lebanon | MIC 2 | mtc touch | + | + | 3G | Callback |
| Lesotho | Vodacom Lesotho | VODACOM LESOTHO | + | + | | Callback |
| Liberia | Lonestar Communications Corporation | Lonestar Cell | + | + | | Callback |
| Liberia | Cellcom Liberia | Cellcom | + | + | 3G | Callback |
| Libya | Al Madar Al Jadid | MADAR | + | + | | Callback |
| Liechtenstein | A1 Telekom Austria | A1 | + | + | 4G/3G | Direct call |
| Lithuania | OMNITEL | OMNITEL | + | + | 4G | Direct call |
| Luxembourg | POST Luxembourg | POST | + | + | 3G | Direct call |
| Luxembourg | Tango SA | TANGO | + | + | 4G/3G | Direct call |
| Luxembourg | Orange S.A. | VOXmobile | + | + | 4G/3G | Direct call |
| Macao | Hutchison Telephone, Macao | Hutchison Macau | + | + | 3G | Callback |
| Macao | Smartone Mobile Communications (Macao) Ltd. | SMARTONE MACAU | + | + | 3G | Callback |
| Macao | Companhia de Telecomunicacoes de Macau S.A.R.L. | CTM | + | + | 4G/3G | Callback |
| North Macedonia | VIP OPERATOR DOOEL | Vip MK | + | + | 3G | Callback |
| Madagascar | Orange Madagascar S.A. | Orange Madagascar | + | + | | Callback |
| Malawi | Telekom Networks Malawi ltd | Telekom Network | + | + | | Callback |
| Malaysia | Maxis Communications Berhad | Maxis | + | + | 4G/3G | Callback |
| Malaysia | DiGi Telecommunications Sdn Bhd | DIGI | + | + | 4G/3G | Callback |
| Maldives | Ooredoo Maldives | Ooredoo | + | + | 3G | Callback |
| Mali | Orange Mali SA | Orange MALI | + | + | 3G | Callback |
| Malta | Mobisle Communications Limited | go mobile | + | + | 4G/3G | Direct call |
| Mauritius | Orange Mauritius | Orange Mauritius | + | + | 3G | Callback |
| Mayotte | Orange Reunion | Orange Reunion | + | + | | Callback |
| Mexico | Radiomovil Dipsa SA de CV (TELCEL) | TELCEL GSM | + | + | 4G/3G | Callback |
| Moldova | Moldcell SA | MOLDCELL | + | + | | Callback |
| Moldova | Orange Moldova S.A. | ORANGE | + | + | 3G | Callback |
| Moldova | Moldtelecom | UNITE | + | + | 3G | Callback |
| Monaco | MONACO TELECOM MOBILE | MT | + | + | 3G | Callback |
| Mongolia | MobiCom | MobiCom | + | + | | Callback |
| Montenegro | MTEL D.O.O. Podgorica | MTEL | + | + | 3G | direct call |
| Montserrat | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Morocco | Maroc Telecom | IAM | + | + | 4G/3G | Callback |
| Morocco | Wana Corporate | Wana | + | + | 3G | Callback |
| Mozambique | Vodacom Mozambique | Vodacom Mozambique | + | + | 3G | Callback |
| Myanmar | Ooredoo Myanmar | Ooredoo | + | + | 3G | Callback |
| Myanmar | Telenor Myanmar Limited | Telenor | + | + | 3G | Callback |
| Namibia | MTC Namibia | MTC | + | + | | Callback |
| Nepal | Spice Nepal Private Ltd | Ncell | + | + | 3G | Callback |
| Netherlands | KPN B.V. | KPN Mobile | + | + | 4G/3G | Direct call |
| Netherlands | Vodafone Libertel N.V. | Vodafone | + | + | 3G | Direct call |
| Netherlands Antilles | Telcell N.V. (St. Maarten) | Telcell N.V. | + | + | 3G | Callback |
| Netherlands Antilles | Curacao Telecom N.V. | Digicel Netherlands Antilles | + | + | | Callback |
| New Caledonia | Office des Postes et Telecommunications | NCL MOBILIS | + | + | 3G | Callback |
| New Zealand | Spark New Zealand Trading Limited | Spark NZ | + | + | 3G | Callback |
| New Zealand | Two Degrees Mobile Ltd | 2degrees | + | + | | Callback |
| Nicaragua | ENITEL | CLARO NIC | + | + | 3G | Callback |
| Niger | Atlantique Telecom Niger | Telecel Niger | + | + | | Callback |
| Nigeria | MTN Nigeria | MTN | + | + | 3G | Callback |
| Norway | Telia Norge AS | TeliaN | + | + | 4G/3G | Direct call |
| Oman | Oman Telecommunications Company | OMAN MOBILE | + | + | 4G/3G | Callback |
| Palestine | Palestine Cellular Communications, Ltd. | JAWWAL | + | + | | Callback |
| Panama | Claro Panama S.A. | Claro Panama | + | + | 3G | Callback |
| Papua New Guinea | Digicel PNG Ltd. | Digicel PNG | + | + | 3G | Callback |
| Paraguay | AMX Paraguay S.A. - Claro | CLARO PARAGUAY | + | + | 3G | Callback |
| Peru | America Movil Peru S.A.C | CLARO PER | + | + | 3G | Callback |
| Peru | Telefonica del Peru | movistar | + | + | | Callback |
| Philippines | Smart Communications Inc | SMART Gold | + | + | 3G | Callback |
| Philippines | Globe Telecom | Globe Telecom | + | + | 3G | Callback |
| Poland | Orange Polska S.A. | Orange | + | + | 4G/3G | Direct call |
| Poland | P4 Sp. z o.o | P4 | + | + | 4G/3G | Direct call |
| Portugal | MEO - Serviços de Comunicações e Multimédia, S.A | MEO | + | + | 4G/3G | Direct call |
| Portugal | Vodafone Portugal | Vodafone | + | + | 3G | Direct call |
| Puerto Rico | AT&T (Cingular) | AT&T | + | + | 4G/3G | Callback |
| Puerto Rico | Claro Puerto Rico | Claro | + | + | 3G | Callback |
| Qatar | Qatar Telecom (Ooredoo) Q.S.C. | Ooredoo | + | + | 3G | Callback |
| Qatar | Vodafone Qatar Q.S.C. | Vodafone Qatar | + | + | 3G | Callback |
| Réunion | Orange Reunion | Orange reunion | + | + | | Callback |
| Romania | Orange Romania SA | ORANGE | + | + | 4G/3G | Direct call |
| Russian Federation | Mobile TeleSystems | MTS-RUS | + | + | 4G/3G | Direct call |
| Samoa | Digicel (Samoa) Limited | Digicel Samoa | + | + | | Callback |
| San Marino | Telecom Italia S.p.A. | TIM | + | + | 4G/3G | Direct call |
| San Marino | WIND Telecomunicazioni S.p.A. | WIND Telecomunicazioni S.p.A | + | + | 4G/3G | Direct call |
| Saudi Arabia | Saudi Telecom Company (STC) | AL JAWAL | + | + | 3G | Callback |
| Saudi Arabia | Etihad Etisalat Company – mobily | Mobily | + | + | 3G | Callback |
| Serbia | Telekom Srbija a.d. | Telekom Srbija | + | + | 3G | Direct call |
| Seychelles | Cable & Wireless (Seychelles) Ltd. | C&W SEY | + | + | 3G | Callback |
| Sierra Leone | Airtel (SL) Limited | Airtel Sierra Leone | + | + | | Callback |
| Singapore | Singapore Telecom Mobile Pte Ltd | SingTel | + | + | 4G/3G | Callback |
| Singapore | StarHub Mobile Pte Ltd | StarHub | + | + | 4G/3G | Callback |
| Slovakia | Telefónica O2 Slovakia, s.r.o. | O2 - SK | + | + | 4G/3G | Direct call |
| Slovenia | SI.MOBIL d.d. | SI.MOBIL- Vodafone | + | + | 4G/3G | Direct call |
| South Africa | Telkom SA | Telecom Mobile | + | + | 3G | Callback |
| South Africa | VODACOM GROUP PTY LTD | Vodacom | + | + | 3G | Callback |
| Spain | Orange Espagne, S.A | Orange | + | + | 4G/3G | Direct call |
| Sri Lanka | Mobitel (Pvt) Limited | Mobitel | + | + | 4G/3G | Direct call |
| Saint Kitts and Nevis | Digicel | Digicel | + | + | | Callback |
| Saint Kitts and Nevis | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Saint Lucia | Digicel | Digicel | + | + | | Callback |
| Saint Lucia | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Saint Vincent and the Grenadines | Digicel | Digicel | + | + | | Callback |
| Saint Vincent and the Grenadines | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Suriname | Digicel | Digicel | + | + | | Callback |
| Swaziland | Swazi MTN Limited | Swazi MTN | + | + | | Callback |
| Sweden | TeliaSonera Mobile Networks AB | TeliaSonera Mobile Networks | + | + | 4G/3G | Direct call |
| Switzerland | Sunrise Communications AG | sunrise | + | + | 4G/3G | Direct call |
| Switzerland | SWISSCOM (SWITZERLAND) LTD | Swisscom | + | + | 3G, 4G | direct call |
| Syria | MTN Syria | MTN Syria | + | + | | Callback |
| Taiwan | Taiwan Mobile Co | TWM | + | + | 4G/3G | Callback |
| Tajikistan | Indigo Tajikistan | TCELL | + | + | 3G, 4G | direct call |
| Tanzania | Vodacom Tanzania Limited | Vodacom Tanzania Limited | + | + | 3G | Callback |
| Thailand | Advanced Wireless Network Company Limited | AWN | + | + | 3G, 4G | callback |
| Togo | Togo Telecom | TOGO CELL | + | + | | Callback |
| Tonga | Digicel (Tonga) Limited | Digicel (Tonga) Limited | + | + | | Callback |
| Trinidad and Tobago | Telecommunications Services of Trinidad&Tobago Ltd | TSTT | + | + | 3G | Callback |
| Tunisia | ORANGE TUNISIE, SA | Orange Tunisie | + | + | 3G | Callback |
| Turks and Caicos Islands | Digicel | Digicel | + | + | | Callback |
| Turks and Caicos Islands | CABLE & WIRELESS WEST INDIES | Cable & Wireless | + | + | | Callback |
| Turkey | Turkcell Iletisim Hizmetleri A.S. | Turkcell Iletisim Hizmetleri A.S. | + | + | 4G/3G | Direct call |
| Turkey | TT MOBIL ILETISIM HIZMETLERI A.S. | Turk Telekom | + | + | 4G/3G | Direct call |
| Turkmenistan | Altyn Asyr TM Cell | Altyn Asyr | + | + | | Callback |
| Uganda | MTN Uganda Ltd | MTN-UGANDA | + | + | | Callback |
| Ukraine | PRJSC VF UKRAINE | Vodafone UA | + | + | 3G | Direct call |
| United Arab Emirates | Emirates Telecom Corp-ETISALAT | ETISALAT | + | + | 4G/3G | callback |
| United Kingdom | Telefonica UK Limited | O2 | + | + | 4G/3G | Direct call |
| United Kingdom | EE Limited (T-Mobile) | T-Mobile UK | + | + | 4G/3G | Direct call |
| United Kingdom | EE Limited (Orange) | ORANGE | + | + | 3G | Direct call |
| United Kingdom | Jersey Telecom | Network | + | + | 4G/3G | Direct call |
| Uruguay | ANTEL | ANTEL | + | + | 3G | Callback |
| Uruguay | AM Wireless Uruguay S.A. | CLARO URUGUAY | + | + | 3G | Callback |
| United States | AT&T | AT&T | + | + | 4G/3G | Direct call |
| United States | T-Mobile USA | T-Mobile USA | + | + | 4G/3G | Direct call |
| Uzbekistan | Coscom | Ucell | + | + | 3G | Direct call |
| Vanuatu | Digicel (Vanuatu) Ltd | Digicel Vanuatu | + | + | | Callback |
| Vatican City | Telecom Italia S.p.A. | TIM | + | + | 4G/3G | Direct call |
| Vatican City | Wind Telecomunicazioni S.p.A | Wind Telecomunicazioni SpA | + | + | 4G/3G | Direct call |
| Venezuela | Corporacion Digitel C.A. | DIGITEL | + | + | 3G | Callback |
| Vietnam | Viettel Corporation | Viettel Mobile | + | + | 3G | Callback |
| Zambia | Airtel Networks Zambia Plc. | Airtel | + | + | | Callback |
| Zimbabwe | Telecel Zimbabwe (PVT) Ltd | TELECEL | + | + | | Callback |
| Cambodia | VIETTEL (CAMBODIA) PTE., LTD | Metfone | + | + | 3G | callback |
