Mobile phone number:
| Region | Roaming Destination | Roaming Operator |
Applicable to Apple Watch International Roaming Service |
| Americas | Brazil | VIVO | ✓ |
| Canada | Telus | ✓ | |
| Bell Mobility | ✓ | ||
| Costa Rica | Claro | ✓ | |
| Guam | IT&E | ✓ | |
| Guam – Rota | IT&E | ✓ | |
| Guam – Saipan | IT&E | ✓ | |
| Guam – Tinian | IT&E | ✓ | |
| Guatemala | SERCOM | ✓ | |
| United States | AT&T | ✓ | |
| Viaero Wireless | ✓ | ||
| Verizon Wireless | ✓ | ||
| T-Mobile | ✓ | ||
| United States - Hawaii | AT&T | ✓ | |
| Verizon Wireless | ✓ | ||
| United States - Puerto Rico | AT&T | ✓ | |
| United States - US Virgin Islands | AT&T | ✓ | |
| Asia Pacific | Australia | Telstra | ✓ |
| YES OPTUS | ✓ | ||
| Cambodia | TMIC | ✓ | |
| Metfone | ✓ | ||
| Mainland China | China Mobile | ✓ | |
| CHINA TELECOM | ✓ | ||
| China Unicom | ✓ | ||
| India | Airtel* | ✓ | |
| Indonesia | TELKOMSEL | ✓ | |
| Japan | DoCoMo | ✓ | |
| KDDI | ✓ | ||
| SoftBank | ✓ | ||
| Macau | CTM | ✓ | |
| Malaysia | Maxis Mobile | ✓ | |
| U Mobile | ✓ | ||
| New Zealand | Telecom New Zealand | ✓ | |
| Philippines | Globe Telecom | ✓ | |
| SMART | ✓ | ||
| Singapore | Singapore Telecom | ✓ | |
| StarHub | ✓ | ||
| South Korea | SK Telecom | ✓ | |
| LGUplus | ✓ | ||
| KTF | ✓ | ||
| Sri Lanka | Dialog Telekom Limited | ✓ | |
| Taiwan | Chunghwa | ✓ | |
| FarEasTone | ✓ | ||
| Taiwan Mobile | ✓ | ||
| Thailand | AWN | ✓ | |
| DTN | ✓ | ||
| Vietnam | Viettel Vietnam | ✓ | |
| Europe | Austria | Orange Austria | ✓ |
| Belgium | Base NV/SA (Telenet) | ✓ | |
| Belgacom Mobile | ✓ | ||
| Bulgaria | Globul (Yettel) | ✓ | |
| Czech Republic | Eurotel Praha | ✓ | |
| T-Mobile Czech Republic a.s. | ✓ | ||
| Denmark | Nuuday A/S | ✓ | |
| Hutchison 3G Denmark | ✓ | ||
| Telenor A/S | ✓ | ||
| Denmark – Bornholm | Nuuday A/S | ✓ | |
| Hutchison 3G Denmark | ✓ | ||
| Telenor A/S | ✓ | ||
| Denmark – Langeland | Nuuday A/S | ✓ | |
| Hutchison 3G Denmark | ✓ | ||
| Telenor A/S | ✓ | ||
| Denmark – Tasinge | Nuuday A/S | ✓ | |
| Hutchison 3G Denmark | ✓ | ||
| Telenor A/S | ✓ | ||
| Finland | DNA | ✓ | |
| France | Bouygues Telecom | ✓ | |
| Orange France | ✓ | ||
| SFR | ✓ | ||
| France - Corsica | Bouygues Telecom | ✓ | |
| Orange France | ✓ | ||
| SFR | ✓ | ||
| Germany | O2 (Germany) GmbH & Co. OHG | ✓ | |
| Telekom Deutschland GmbH | ✓ | ||
| Iceland | Nova ehf | ✓ | |
| Italy | TIM S.p.A. | ✓ | |
| Italy - San Marino | TIM S.p.A. | ✓ | |
| Italy - Sardinia | TIM S.p.A. | ✓ | |
| Italy - Sicily | TIM S.p.A. | ✓ | |
| Italy - State of Vatican City | TIM S.p.A. | ✓ | |
| Jersey | Jersey Telecom | ✓ | |
| Guernsey | Jersey Telecom | ✓ | |
| Liechtenstein | Swisscom Mobile Ltd | ✓ | |
| Luxembourg | P &T Luxembourg | ✓ | |
| Tango Luxembourg | ✓ | ||
| Netherlands | KPN | ✓ | |
| Netherlands - West Frisain Islands | KPN | ✓ | |
| Netherlands - Zeeland | KPN | ✓ | |
| Norway | Telenor Mobil | ✓ | |
| Norway - Lofoten Islands | Telenor Mobil | ✓ | |
| Norway - Svalbard | Telenor Mobil | ✓ | |
| Norway - Vesteralen | Telenor Mobil | ✓ | |
| Russia | MTS | ✓ | |
| Spain | Telefonica Moviles Spain | ✓ | |
| Spain - Cabrera | Telefonica Moviles Spain | ✓ | |
| Spain - Canary Islands | Telefonica Moviles Spain | ✓ | |
| Spain - Ceuta | Telefonica Moviles Spain | ✓ | |
| Spain - Formentera | Telefonica Moviles Spain | ✓ | |
| Spain - Ibiza | Telefonica Moviles Spain | ✓ | |
| Spain - Mallorca | Telefonica Moviles Spain | ✓ | |
| Spain - Melilla | Telefonica Moviles Spain | ✓ | |
| Spain - Menorca | Telefonica Moviles Spain | ✓ | |
| Sweden | Comviq (Tele2) | ✓ | |
| Hutchison 3G Sweden | ✓ | ||
| Telenor | ✓ | ||
| Sweden - Gotland | Hutchison 3G Sweden | ✓ | |
| Telenor | ✓ | ||
| Sweden - Oland | Hutchison 3G Sweden | ✓ | |
| Telenor | ✓ | ||
| Switzerland | Swisscom Mobile Ltd | ✓ | |
| Sunrise | ✓ | ||
| United Kingdom | Three UK | ✓ | |
| United Kingdom - Hebrides | Three UK | ✓ | |
| United Kingdom - Northern Ireland | Three UK | ✓ | |
| United Kingdom - Orkney Islands | Three UK | ✓ | |
| United Kingdom - Shetland Islands | Three UK | ✓ | |
| Middle East | Israel | HOT Mobile | ✓ |
| Pelephone | ✓ |
|
*India's coverage : Andhra Pradesh, Assam, Bihar, Chennai, Delhi, Gujarat, Haryana, Himachal Pradesh, Karnataka, Kerala, Kolkata, Madhya Pradesh, Maharashtra, Mumbai, North East, Orissa, Punjab, Rajasthan, Tamil Nadu, UP East, UP West, West Bengal |
