Bit of a geeky joke this but...
I lift share (sadly only for another month, as he's leaving Sky) but he has a BMW 235i with connected BMW Drive App on his phone. Today I left my phone in his car, I only noticed when I got to my desk. Now my car share buddy works in a different building to me, 15 min walk away. My phone was on and connected into interwebs, so I used WhatsApp web via my Mac to message him.
He told me to call him, when I was outside the car. He would unlock it while still at his desk, as he could do it from there.
Ah, but I have no means to call him when outside it. But, I had my Apple Watch on, so I walked to the car and my watch connected via bluetooth as I was stood outside. So I called my car share buddy, via my watch. (it has mic/speaker)
Told him I was outside, he unlocked the car, I retrieved my phone. He then locked it again, while I walked back to my desk.
