Mobile phone number:
| Region | Roaming Destination | Roaming Operator |
Applicable to Apple Watch International Roaming Service |
| Africa | Mauritius | Cellplus (my.t) | ✓ |
| Americas | Argentina | Claro Argentina | ✓ |
| Brazil | TIM BRASIL | ✓ | |
| Vivo | ✓ | ||
| Canada | Bell Mobility | ✓ | |
| Rogers | ✓ | ||
| Sasktel | ✓ | ||
| TELUS | ✓ | ||
| Videotron | ✓ | ||
| Costa Rica | Claro | ✓ | |
| Guatemala | Claro Guatemala | ✓ | |
| Mexico | TELEFONICA MEXICO | ✓ | |
| Paraguay | Claro | ✓ | |
| United States | AT&T | ✓ | |
| T-Mobile USA, Inc. | ✓ | ||
| Verizon Wireless | ✓ | ||
| United States - Hawaii | AT&T | ✓ | |
| T-Mobile USA, Inc. | ✓ | ||
| Verizon Wireless | ✓ | ||
| Puerto Rico | AT&T | ✓ | |
| T-Mobile USA, Inc. | ✓ | ||
| US Virgin Islands | AT&T | ✓ | |
| T-Mobile USA, Inc. | ✓ | ||
| Uruguay | Claro Uruguay | ✓ | |
| Asia Pacific / Oceania | Australia | Telstra | ✓ |
| Vodafone PTY | ✓ | ||
| YES OPTUS | ✓ | ||
| Brunei | UNN (DST Comm) | ✓ | |
| Cambodia | Smart Axiata Co., Ltd. | ✓ | |
| Viettel Cambodia | ✓ | ||
| Chinese Mainland | China Mobile | ✓ | |
| China Telecom | ✓ | ||
| China Unicom | ✓ | ||
| Guam | Docomo Pacific | ✓ | |
| IT&E | ✓ | ||
| India | Bharti Airtel | ✓ | |
| Bharti Airtel Kolkata | ✓ | ||
| Indonesia | TELKOMSEL | ✓ | |
| Japan | DoCo Mo | ✓ | |
| KDDI | ✓ | ||
|
Rakuten Mobile |
✓ | ||
| SoftBank | ✓ | ||
| Macao | CTM | ✓ | |
| Malaysia | Celcom | ✓ | |
| DiGi | ✓ | ||
| Maxis | ✓ | ||
| U Mobile | ✓ | ||
| New Zealand | Spark New Zealand | ✓ | |
| Two Degrees Mobile Limited | ✓ | ||
| Vodafone | ✓ | ||
| Palau | PMCI | ✓ | |
| Philippines | Globe Telecom | ✓ | |
| SMART | ✓ | ||
| Rota | Docomo Pacific | ✓ | |
| IT&E | ✓ | ||
| Saipan | Docomo Pacific | ✓ | |
| IT&E | ✓ | ||
| Singapore | Singtel | ✓ | |
| StarHub | ✓ | ||
| TPG Telecom | ✓ | ||
| South Korea | KT | ✓ | |
| LGUplus | ✓ | ||
| SK Telecom | ✓ | ||
| Sri Lanka | Dialog Telekom Limited | ✓ | |
| Taiwan | Chunghwa | ✓ | |
| FarEasTone | ✓ | ||
| Taiwan Mobile | ✓ | ||
| Thailand | AWN | ✓ | |
| DTN | ✓ | ||
| TrueMove | ✓ | ||
| Tinian | Docomo Pacific | ✓ | |
| IT&E | ✓ | ||
| Vietnam | Viettel Vietnam | ✓ | |
|
Europe |
Austria | Orange Austria | ✓ |
| T-Mobile Austria GmbH | ✓ | ||
| Belgium | Base NV/SA | ✓ | |
| PROXIMUS | ✓ | ||
| Bulgaria | Telenor Bulgaria EAD | ✓ | |
| Czech Republic | O2 Czech Republic a.s. | ✓ | |
| T-Mobile CZ | ✓ | ||
| Vodafone CZ | ✓ | ||
| Denmark | Hutchison 3G Denmark | ✓ | |
| Nuuday A/S | ✓ | ||
| Telenor A/S | ✓ | ||
| Telia Denmark | ✓ | ||
| Estonia | Telia | ✓ | |
| Finland | DNA | ✓ | |
| Sonera Corporation | ✓ | ||
| Finland - Aland | Sonera Corporation | ✓ | |
| France | Free Mobile | ✓ | |
| ORANGE | ✓ | ||
| SFR | ✓ | ||
| Germany | O2 (Germany) GmbH & Co. OHG | ✓ | |
| Telekom Deutschland GmbH | ✓ | ||
| Vodafone D2 | ✓ | ||
| Hungary | Magyar Telekom | ✓ | |
| Iceland | Nova ehf | ✓ | |
| Siminn | ✓ | ||
| Syn [Former: Og Fjarskipti hf (Vodafone)] | ✓ | ||
| Italy | ILIAD Italia | ✓ | |
| TIM | ✓ | ||
| Vodafone | ✓ | ||
| Italy - San Marino | TIM. | ✓ | |
| Vodafone | ✓ | ||
| Italy - Sardinia | TIM | ✓ | |
| Vodafone | ✓ | ||
| Italy - Sicily | TIM | ✓ | |
| Vodafone | ✓ | ||
| Latvia | LMT | ✓ | |
| Liechtenstein | Swisscom | ✓ | |
| Lithuania | OMNITEL (Telia) | ✓ | |
| Luxembourg | Orange | ✓ | |
| Tango Luxembourg (Proximus) | ✓ | ||
| Netherlands | KPN | ✓ | |
| Vodafone-Libertel N.V. | ✓ | ||
| Norway | Telenor Mobil | ✓ | |
| Telia | ✓ | ||
| Poland | T-Mobile Polska S.A | ✓ | |
| Romania | RCS & RDS | ✓ | |
| Russia | MTS | ✓ | |
| Serbia | Mobtel | ✓ | |
| Slovak Republic | T-Mobile Slovensko | ✓ | |
| Spain | Telefonica Moviles España, S.A. | ✓ | |
| Vodafone Espana S.A. | ✓ | ||
| State of Vatican City | TIM | ✓ | |
| Vodafone | ✓ | ||
| Sweden | Hutchison 3G Sweden | ✓ | |
| Tele2 Sverige AB | ✓ | ||
| Telenor | ✓ | ||
| TeliaSonera Sverige AB | ✓ | ||
| Switzerland | Salt Mobile SA | ✓ | |
| Sunrise | ✓ | ||
| Swisscom | ✓ | ||
| United Kingdom | EE | ✓ | |
| O2 UK | ✓ | ||
| Vodafone UK | ✓ | ||
| United Kingdom-Guernsey | Jersey Telecoms | ✓ | |
| United Kingdom-Jersey | Jersey Telecoms | ✓ | |
| Middle East | Israel | HOT Mobile | ✓ |
| Pelephone | ✓ | ||
| West Bank | Pelephone | ✓ | |
| Kuwait | MTC Kuwait (Zain) | ✓ | |
| Ooredoo Kuwait | ✓ | ||
| VIVA | ✓ | ||
| Qatar | Ooredoo | ✓ | |
| Saudi Arabia | Saudi Telecom Co | ✓ | |
| Zain | ✓ |
