BenQ M315 - Manual (Page 30)

18 Using Your Phone
Making an Emergency Call
To call emergency services, enter 112 (the international emergency
number) and then press to dial the call. You can make an
emergency call even if your phone is locked or cannot access your
network, or there is no SIM card inserted, so long as you are within
range of a network of the type supported by your phone.
Dialing an Extension Number
After you enter a telephone number, long-press , The phone display
will show "P". At this point, you can enter the desired extension
number, and then press
to dial it.
Speed Dialing
You must assign a number key as the shortcut for a particular phone
number in order to use speed dialing for that phone number. For
information on how to set up a shortcut, see page 35, "Shortcuts".
After you have assigned a number key to serve as the shortcut key for a
particular phone number, you can long-press this key when the phone
is in the standby mode to dial the corresponding phone number. For
example, if you have selected as the shortcut key for a certain
phone number, long-pressing will dial this number.