I'd expect the person selling me a product to be able to tell me what I need to use the product. Like if I was buying a car that runs off LPG or something, I'd expect the salesperson to be able to tell me where I can buy that fuel and roughly how much it costs, even if the car company doesn't actually sell it themselves.

Many of those telco plans in Switzerland that just add a data eSIM don’t actually work with something like an Apple Watch, which is why I assume the GP asked at the store. At least the Apple Watch requires a mobile network to offer a special shared-number add-on and support Apple’s GUI for provisioning this plan with an eSIM on the watch. Unfortunately, this usually means sticking with more expensive first-party networks rather than MVNOs and paying whatever fees they require.

It’s quite possible the Samsung watches don’t rely on this system, but I’m not sure and may have also assumed it was worth asking like the GP.

I guess the OP was from the US. Most US providers still seem to live in the mental world of selling SIM-locked phones, they are no smooth experience for customers bringing their own device.

Prices for just a SIM without buying a phone seem to be pretty high.

Here selling SIM-locked phones is not even legal. In most European countries it is legal, but still less common than in the US. So operators have to serve customers not buying a device from them on competitive terms.

> Most US providers still seem to live in the mental world of selling SIM-locked phones, they are no smooth experience for customers bringing their own device.

This was true 5-10 years ago. Nowadays, nearly every mobile network regularly has offers to entice users to bring their device from a different network in exchange for a cheaper monthly plan or similar.

Most smart watches don’t have a physical SIM card slot since that would be way too big. The software used to load an eSIM onto the watch often has a whitelist for carriers.

Another issue is that both the watch and the phone need to share a phone number if you want to leave your phone at home and answer calls and receive SMS on the watch. This isn’t standardized and only works with each watch’s supported carriers.

The solution to the SMS problem is to use VOIP. I personally very much like JMP.chat.

That would be ideal, but VOIP numbers are blocked in many situations. Most 2fa providers and bank transaction verification comes to mind.

>Most 2fa IME: banks and such are fine with it. Coinbase definitely works.