Ah - ok, this explains it. I didn't watch the video, and I had it in my mind that he custom built a phone (and they were just using the term as a headline grab)

Ah - ok, this explains it. I didn't watch the video, and I had it in my mind that he custom built a phone (and they were just using the term as a headline grab). I was trying to figure out how/where he got a 4G module.