Film maker discovered a scene in Chaplin's The Circus in which a woman walking in the background appears to be talking on her mobile phone. :VeryScared: :VeryScared:
Cell phones (communication devices) are handheld in our current technology. If a technology was advance enough to solve the physics of time travel and walk down a street in 1928 I think they'd have perfected implanted communication devices (estimated to arrive around 2030-2050, or at least have it built into their clothing. They wouldn't be walking around with outdated 2010 technology.