Apple watch se 44mm regional cellular compatibility

The cellular radio included in an Apple Watch sold in Holland is the same radio used in India, China, the EU, Russia, Australia, etc... But if you travel to any of those countries, your Apple Watch, while traveling, will behave as if it was a GPS only model, and depend on the iPhone and WiFi for Internet access, messaging, phone calls, etc... If you move to one of those countries, and want cellular service, you would have to switch your iPhone carrier to a carrier in that country that supports the Apple Watch. If your iPhone has Dual SIM support, it is possible to get a 2nd cellular line and associate the Apple Watch with that carrier (assuming the iPhone cellular carrier supports the eSIM, and also supports the Apple Watch via the iPhone eSIM).

https://www.apple.com/watch/cellular/