http://libraryqno7mkjsntq434rk3t6ncieqx34tlqxisxdv6e552ab6uolyd.onion/library/anonymous-the-cell-phone-and-its-double
From there, the user bicycles to a local library wearing a mask and hat, puts the battery in the civ phone and turns it on, and uses the civ phone for calling family, dealing with banking and government-id-related email, among other things, but never for calling or texting the affinity group. The user does this once or twice a week, and more or less frequently depending on need.