Oic thanks for explaining. I think M1 should be the same ba ...I’m using Singtel so the process is like that. I presume M1 will follow suit, but sometimes might be carrier dependant.
Example today I unpaired my Series 5. During the unpairing process the watch app will ask if you wish to remove existing plan or keep it, so I chose to keep it. Upon pairing my Series 6, during the setup it’ll come to whether you wish to activate the cellular plan as it knows you have one plan on it. So I activated back but Singtel thereafter sent me a service agreement, most probably some re-activation fee.
I meant to say I’ll recommend you to hand wash. Don’t throw it into a washing machine.