About emergency calls
If you are outside a wireless coverage area and the SOS wireless coverage indicator appears, you can only call emergency numbers. Your BlackBerry® device is designed to allow emergency calls even when your device is locked. Depending on your device model and the wireless network that your device is connected to, your device is also designed to allow emergency calls when the SIM card is not inserted. If the connection to the wireless network is turned off when you initiate an emergency call, your device is designed to connect to the wireless network automatically.
You can only make emergency calls by typing official emergency access numbers (for example, 999).