LG had something
LG had something like this too a year or two ago. It was basically a smartphone that was about the size of a calculator watch. I highly doubt it functioned all that effectively, and was quickly buried. Assuming it ever even made it to market. While it might be kind of cool from a purely "Hey, lookit at way we did!" viewpoint, practically there would be so many engineering tradeoffs that would have to be made to get the cost down to anything even remotely close to what people would be willing to pay... Then the idea of having to hold your wrist up to your mouth like you're some kind of secret service agent or something would likely get old real fast.