3 ms·

And also block every guard/visitor/person walking nearby?

• pbhjpbhj 9y ago
  Guards and visitors could easily be whitelisted. Person's walking nearby the cells of a prison should only be guards/visitors or people whose phones you want to block?
  • rtkwe 9y ago
    The IMEI catcher's signal isn't going to stop dead on the edge of the prison/jail yard and a lot are near/in cities. Where I live the jail is right next to the performing arts center and the baseball stadium there'd be massive amounts of false positives.