One of the latest tricks is that if you have social media accounts yet no social media apps or accounts are loaded on your phone, or your phone appears to be a burner phone, they'll ask you why you didn't bring your main, primary phone.
So your "burner phone" needs to be your primary phone, which is something that is hard to go back in time to fix.
This sounds like a rumor to me. Plenty of people (including me) have no social media presence (unless you count HN as social media). How do you know that the person on whatevergram with the same name is me?
So your "burner phone" needs to be your primary phone, which is something that is hard to go back in time to fix.