see below
but they have to be in broadband link range, regular internet can't handle the large data dump. But remember one of Max's (Alice and May as well) upgrades was a small nanobot mainframe that can handle at least one download so they have to be with in a hundred yards or so of him or Alice or May.
And remember that the download isn't a sure thing, Max commented on it once that any glitch in the download would corrupt the data beyond reclamation. So just because the brain survives the second or so it takes the brain map to download doesn't mean the person will survive.
But I'm sure you know there are certain characters that I couldn't kill of without completely changing the tone of the story, plus people have favorites and no matter which one I kill there would be one hell of a backlash...believe it or not I do listen to my readers, often I go my own way but sometimes I change horses. In fact May/June was never supposed to come back and Marge just joins the harem and she, Emma, and Max become a permanant item...probably would never have been a Petra or Tatiana (Though I am having a lot of fun with this storyline, gives me a chance to write male/male which is outside my experience so forgive me if I make a mistake) not sure there would have been a hans either, but maybe...
so there will be a, if not main, at least a first teir character biting the dust relatively soon...actuall their will be several deaths as things start to go to hell!
But who...?