How do i go about getting a nano sim for my smart watch??

[Android Central Question]

I ordered a cheap smart watch on amazon and it said it came with a sim card so I was like cool and now it keeps saying insert sim so I did a little research and found out I can order one through who I have my phone through which is straight talk. ???... I'm so confused as to shy this one that came with it doesn't work it doesn't have any numbers or amything on it so I have no idea where to start please help

 

[belodion]

First, what is the watch? https://forums.androidcentral.com/showthread.php?t=409154