Zte N9517 User Manual page 68

Setting Dial Assist
Dial assist allows the phone to add the prefix or country code for
calls to the U.S. when you are on a roaming network.
1. Tap the Home key >
2. Check Dial assist.
Setting Call Blocking
You can add numbers to the blocked numbers list to filter out
calls and messages from these numbers.
1. Tap the Home key >
2. Tap ADD A NUMBER.
3. Enter the phone number or tap
Recent, Downloads, Contacts, or Drive.
4. Tap BLOCK.
> > Settings > Call settings.
> > Settings > Call blocking.
and select one from
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