Installing SIM Card
Use the mini screwdriver (included) to remove the SIM cover on the watch.
Insert a suitable 4G SIM card with the gold side facing upwards and the diagonal corner facing the bottom right corner of the watch – see image for details.
Push the SIM card all the way in until it clicks into place. You may need to use a fingernail very carefully or something to push it all the way in.
Lock SIM card cover tightly with the screws after the SIM card is installed to ensure water proofing.
Push SIM in slightly until you feel it click to release.
DO NOT TURN ON THE WATCH UNTIL YOU HAVE SCANNED THE QR CODE INSIDE THE FOLLOWING APP SETUP
You can also follow this tutorial video: