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What is a SIM card for a smartwatch?

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I think some higher-end smartwatches use eSIM technology? A "virtual" "universal" SIM HW is embedded within the smartwatch, which, assuming your mobile provider supports the embedded technology, can be re-programmed to work with your provider/plan.


Otherwise, you'll have to use Bluetooth to communicate with a mobile phone (which has a SIM), for mobile telephony services (voice calls), and internet access (over and above embedded WiFi).


I think that's what that watch seems to require? 


What are you hoping to be able to do re: SIM?





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