He called his father from the battlefield on a satellite phone to say that he was bleeding out.
Practically every satellite phone and radio had been stomped, shot, or stoned during the attack, but the Sherpas might carry one.
U.S. spy aircraft is also monitoring mobile and satellite phone use, according to The Telegraph.
He borrowed their satellite phone and contacted the CIA in Tashkent, who relayed his situation to Team Alpha.
Zhang eventually crept back to camp and found a satellite phone to summon help.
Someone eventually brought the pilot a Thuraya satellite phone which he used to call his family.