A Secret Phone

If you see a BT  global billboard, there is  often a hidden phone on the side of the display that lets you make a free phone call. 

Many one then have a dial pad with a speaker and microphone and a button to speed dial emergency services. 

They also have usb charging  ports so you can charge up your phone. 

Smart Phone Quirk

If you connect a blue tooth mouse to your android phone, a cursor will appear on the screen just like it would if it were a desk top computer. 

image generated by artificial intelligence (chat GPT)

The feature even works if you use a combo blue tooth keyboard and touchpad. Not to mention you can cast your screen to a Chromecast device.