I asked this late on the doppel plot so I'll ask here! It makes sense the doppelgangers have access to things that require passwords and account names like email and whatnot, but what about physical devices like phones? Thus would it be possible to contact each other through normal, non-numbered ways like phones and keep information from doppels?

OH YEAH AND SINCE WE'RE HERE. Do doppelgangers get echoes of their own, or only the originals?