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I have been trying to get this no robo call thing to work and after two days of trying, it still says my phone isn't protected, so I guess I may as well give up. I have called the help line and it still doesn't work.
Have you tried these instructions? If so, where are you getting stuck?
I have done all of this and I still get the message that my number 520-3XX-9XXX is not protected, so I give up.