The watch and phone do not need to be on the same network. T-Mobile and Verizon have standalone wearable plans for $15/mo. I'll speak specifically about the Gear S3, although it should be the same...afblangley Today, 12:31 AM
This is BOSS!! How long will that sim card last? I mean I imagine this sim card would be audited at some point.. Correct?
What phone did you get it out of?
wait a week or two and then see how it goes.
if the phone messes up again then try the new sim.