Who remembers the time little stickers with a 'gold printed circuit' were touted as being range extenders/boosters for mobile phones? Turned out to be more useless than a dunny roll wrapped in tin foil
I now see they are promoting external antenna for phones that plug into the ear-phone socket … THIS sort of thing.
Has anyone tested or used such a thing? Is using the ear-phone socket gonna work? For $4 I might try it