@Juliablocker-
I expect you just need to log into your account on each of the other two sets.
I'm not familiar with MOTV, but if the place to log on is not right there on the app's home page you can usually find it in an OPTIONS, SETTINGS, ACCOUNT, or similarly named option.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X
