They can use the app on the smart phones that Americans provide for them. This won’t be a thing. Meanwhile, instead of Greenland, how about a couple of miles on the other side of the Rio Grande?
...for a no-mans land minefield...
Well one of the first things Noem should do is put a stop payment on all the government supplied phones, let the illegals pay their own damn phone bills, giving them a phone all at our expense was freakin insane.