Welcome to Android Central! Which watch do you have? Is it one of those Chinese ones that acts as a mini-phone on your wrist (as opposed to a true Android Wear device)? You should just be able to insert the SIM card into the watch's SIM slot. If the card you have isn't the right size, then you can either cut the card to the right size (there are cutters available on Amazon and other sites), or use an adapter if you need a bigger size. Or you could get a new card of the right size from MetroPCS.
If you have inserted the card and can't get service, then it's possible the watch doesn't support MetroPCS's bands.
08-24-2016 12:56 PM
