Zte Spark Pocket - Powering the Phone On and Off; Making and Receiving Phone Calls

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Power your phone on and off
Make sure that your SIM card is in your mobile phone and that the battery is
charged.
Hold the End/Power key to power the phone On or Off.
Phone calls
Enter the number directly on the keypad and press the Call key. You can also
make a call from the Phonebook list:
Press OK key to enter Menu > Phonebook >OK. Use the Up/Down keys to
find the name of the person you want to call. You can also type in the first
letter of the name of the person and press the Call key.
 To receive a call, press the Call key.
 To end a call, press the End/Power key.
 To reject a call, press the End/Power key. The caller will go to voicemail.