You mean in addition to not being coded as AF1? That in itself is a huge tell.
‘AF1’ callsign, as GWO points out, is just one sign of many... a big one, of course, but there are SO SO SOOOOO many, it’s not funny: it’s ridiculous that most of the Republic still have no idea we have an actor, BidAn being propped up (by white hats, of course).
Here is a list of more, some or most of them I have corroborating pointers or info to:
WH goes dark every single night at 11 PM, almost without exception, since 1/20
On 1/20, DJT departs DC on AF1; BidAn arrives on a private aircraft; DJT gets presidential 21 gun salute, BidAn gets 7 gun funeral salute; DJT stands in front of 17 flags at Andrews
The handling of the wreath at the tomb of the unknown soldier on Memorial Day - military protocol is NOT followed
BidAn regime told not welcome in the Pentagon, back in January or February
VA hospitals, in the place where they normally hang up a POTUS picture, are all blank (or contain some temp placeholder, other than BidEn/BidAn)
DC is shutdown, empty, ghost town
US Military sent 4 heavily armed choppers in a “training mission” to the Capitol a few weeks ago, all sat aimed towards the building, all running their engines full bore the whole time, no personnel ingres/egress, for about 2 hours.
I’m sure there are dozens more too, some I know, and I’d surmise many I do not