Connect your device to an HDMI display
Using an HDMI cable, connect your BlackBerry device to an HDMI display.
Your device automatically detects the resolution of the HDMI
display that your device is connected to. However, if you need to change the
resolution, on the home screen, swipe down from the top of the screen. Tap
Settings > Display. In the HDMI
Display Mode drop-down list, tap the display mode that you want