How to test signal strength on X1 - XFinity


I have seen this asked a few times, but they are all a few years old.
They did say something about holding the exit button down for three to five seconds...when I try this with my remotes (the version you can talk with) my screen flickers like you have pressed the button but never goes to any type of support or setup screen.

what do I do to test/look at the signal strength?

What if I just ignor testing and add a boster, would it harm anything?

thank you...

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