Clamshell Design
The phone opens and closes like a clam shell. It must be open to use any of the phone’s features. When the phone is closed, the keypad is locked and covered. You will hear the phone ring (if the phone is on) but you must open the phone to answer the call.
This feature allows you to keep the phone on, and in your pocket or brief case, without accidently press- ing any keys. Since the power 
button is on the outside of the phone, the phone can be turned on or off whether the phone is open or closed.
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