The 'mobile phone' of the 1920s

We're now 3 weeks into the Fall in Love with Writing challenge and the bulk of the research for One Lump or Two has been completed. I'll share a few factoids here every now and again. For example, did you know the "Mobile Phone" was invented in the '20s? Here's a cute little video showing some ladies using an umbrella as an antenna and fire hydrant for grounding wires in order to place a call of sorts: