https://www.cnet.com/news/blackberry-teases-dual-cams-and-mystery-button-on-key2/ > Excited for the BlackBerry Key2 unveiling on June 7? BlackBerry is, and it shared a short video teaser to give us our first official look at the phone. You can watch it below: > The video highlights new features like the phone's dual cameras and a mystery button next to the symbol key. Dual cameras may mean that the Key2 will take better pictures than its predecessor, but the purpose of this mystery button is not yet clear. When CNET asked TCL (the parent company of BlackBerry's phones) about the purpose of this button, a spokesperson said to tune in on June 7.