Setting up mobile plan on galaxy watch ultra

[Martin643]

I have galaxy watch ultra and a one plus 9 pro mobile (dual sim) . Not using esim in the watch. 

After setup, I choose Mobile plan from phone's galaxy wear app, settings. It presents the 2 sims I have in my phone and says "select a sim to setup on your watch".

Does this mean it will use the sim in my phone to communicate with the Internet (subject to some limits I set in the "plan"), or is it some bug, or just unfinished software??

🙏

[Fiona26]

It's just asking you which sim to select that will work with the watches esim. The watch will use the one that's been set up an esim to have with your phone for making calls and receiving them. So if neither sim or network have been set up an esim for the watch. It will not work.

[TechZilla]

You need a smartwatch plan to use lte on your watch, you select which phone sim you want to link it to.

[Martin643]

So it shares the sim from the phone, or it must be different? I had assumed esim would be unique.

Why is it doing this? If I want an esim profile I would expect it is unique, otherwise it's like having 2 phones with the same sim, no? Why would I put the sim in my phone, when really I want it in my watch? There are different ways it could work, some basic rules need stating. 

[Martin643]

I spoke to Samsung customer service. For my scenario (no esim configured in watch) they say it will configure an esim profile based on the choice of mobile sim I answer (ignores my android configure of what sim I use for calling and what sim I use for Internet). I would end up with a *copy* of the sim from my phone.

Apparently there's then configuration about prioritising watch or mobile for receiving text and calls. However it seems to me there's a security risk regarding sms 2fa, now that the sim is on 2 devices. I'm guessing there's also issues regarding the sim contract provider. Perhaps they are OK with the copy scenario, or perhaps they are not. I think their knowledge of the esim profile includes that the device is a watch, but I'm guessing.

From a user and security point of view, more information needs publishing in a form that is easy to find and easy to understand. 

At the moment it feels a bit wild/cutting edge?