First there was Browns general manager John Dorsey, followed by fellow GMs Dave Gettleman of the Giants, John Elway of the Broncos, and Chris Ballard of the Colts, all making the claim at the NFL Scouting Combine that their iPhones will be fully charged, ready to talk trade with whomever calls. “My door is wide open if somebody wants to come up and talk to me about a trade,” said Dorsey. “I’m willing to trade. Any good GM wants to field phone calls from all his peers. Why wouldn’t I? So, that’s why I say … just give me a call and see what’s up.” Brandon Beane, Bills GM, you’ve been forewarned. The Browns hold the first and fourth picks in the 2018 NFL Draft, the Giants have No. 2, the Colts No. 3, and the Broncos No. 5, and only the Colts aren’t in need of a franchise quarterback. “Do we think we’re in a pretty good spot? Yes,” Ballard said. Thus, based on what happens in the month and a half between the start of free agency and the draft, when we’ll see where some of the better veteran free-agent quarterbacks land, all of these teams could become trade partners for Buffalo if it wants to trade up to pick a potential franchise quarterback. Dorsey figures to be very busy because there’s one school of thought where he’ll use the No. 1 pick on whichever quarterback he falls in love with — be it Josh Rosen, Sam Darnold, Josh Allen or Baker Mayfield — and then put that fourth pick in play to acquire more draft capital.