Zte A16 User Manual page 31

Making IDD: Hold * key until your screen displays the character "+" which is the
preset symbol of an international call, then enter the country code and complete
phone number and then press Dial key.
Dialing the number in the List: Generally, all calls you have made or received
are saved in a list of the phone. All numbers are grouped as Dialled Calls,
Received Calls and Missed Calls. Your mobile phone lists all the numbers so that
you can view all the call logs. When the list is full, old numbers will be deleted
automatically. You can check the list by the following operations:
All the numbers in the list can be directly dialed by Dial key.
When there is a list of phone numbers, Press Up/Down key to select the
number and then press Options to enter submenu interface.
UP/DOWN/LEFT/RIGHT key can be set according to what you needs by
pressing Menu-Settings-Phone settings-Fastkey settings.
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