That's assuming it actually happened. I did find a clip where he talks about it, and the whole story sounds like a fanfic. Either that, or everyone involved is extremely retarded.
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Jason called the FBI to report a hacker hacking at a hacker convention. If that didn't get him shunned from the DEFCON community, then the community is gayer and glows more than I previously estimated — assuming any of this is real.
This was at DEFCON 24 (2016), the same DefCon he won his second Black Badge for solving the Badge puzzle. The Badge puzzles at this time were designed by
Ryan Clark (
archive) aka LosT/LostboY/李智上/1O57. Jason was given a position of authority by Ryan Clark to manage the room dedicated to this puzzle challenge, and used his position to lie and mislead other participating teams while stealing their contributions. I guess that left him with a lot of time to start pulling apart rogue machines, reading "logs" from the card, and calling the FBI.
This is just wild speculation, but this device could have been a modified FemtoCell which has a very small signal radius of 15ft-50ft (hence why multiples of them were found), to passively sniff SMS communications from competing teams in the challenge. Similar to Jason stealing information, using a FemtoCell to do so is gigaflexing compared to Jason's "social engineering".
Anyway, this is funny because FemtoCells became a really popular topic when they appeared in the hacker show Mr Robot, where a modified FemtoCell is used to eavesdrop on the FBI. Jason has strong opinions on the show Mr Robot:
Jason alleges that Mr Robot stole his research on previous puzzles he solved and used it for the plot of the show. His proof is that the show mistakenly included included an answer to one of the puzzles which was a cellphone number to the "puzzle maker", who I am assuming is Ryan Clark. This apparently made it to broadcast, causing Ryan Clark to get a flood of unwanted calls when his phone number appeared on national television.
According to the
DEFCON Facebook page, LosT (Ryan Clark) was working on a secret project with the Mr Robot team around the time after Jason's second confirmed visit to DEFCON.

Archives of InfoSec presentations also credits Ryan Clark as being a
"consultant for Mr Robot" (
Archive). The only information I could find about a phone number leaking from the show came from the
Season 2 Trailer, which at 0:41 shows the following phone number: (212) 804-6003.

When dialed, this number goes to an automated service themed after the show's antagonist company E-Corp, in which the voice service appears to malfunction and offers a mysterious message, and series of beeps. This is the introduction to a Mr Robot themed puzzle, also known as an
Alternate Reality Game (ARG). information on the ARG was posted to
Reddit (
Archive), and timelines coincide to Jason's involvement with LosT and DEFCON.
Jason's research was never stolen by Mr Robot. LosT did not give his real phone number out to a bunch of random hackers at a convention. Jason probably hallucinated this, or it's like the rest of his war stories — cobbled together from a bunch of hearsay he's overheard, then attaches his name to it.
(Jason, if you're reading this, and all of what you claim is actually true, then I fucking hate you for making me waste my time going down this rabbit hole because you can never elaborate, or post receipts for anything you say or do. Fuck you.)