Did the President Use a Burner Phone?

The committee that's investigating the january sixth insurrection is looking into and investigating why that sevenna, seven and a half hour gap exists from 11 17 a m to six 54 p m. There are no records from the white house records office or from the switchboard. And so the question is, were those records removed by some one? Were they just simply not recorded properly? Did the committee not receive the full list of records? One of the possible answers, erran, comes from the former president himself, in a statement he provided to the washington post. He says he, to his knowledge, has never heard of the term burner phone.