There is hefty spoilers containing the fact that the winners voted out are allowed to use their phones at ponderosa as an agreement for them coming back.
With this being said it is heavily speculated that Yul is the first boot and he contacted his Brother-In-Law about it. Spoilers on Sucks.
Second Spoiler while not being very reliable is a little questionable and it's Ben following someone on Instagram..
So there ya have it
Yul and Ben speculated to be two of the first five boots so far. #Survivor
