We don't know if
gatekeeper already grabbed the phone from Glen's shack yet. The night before the civil war at
the colony is when gatekeeper said he could retrieve the sat phone.
Victor may already have had the shack's phone in his possession. Meaning they only have to get
Lizzy and
Burt out. All of this falling into place seems too good to be true. So either one of the three (Lizzy, Burt, and phone) get left behind. Or
Saul, Victor or CJ don't make it out alive.
There is also the possibility that Victor and Lizzy don't get a chance to rendezvous with Saul and CJ.