Gigabyte GSmart i350 User Manual page 22

1. Check "Block all unknown calls" or tap
"Menu" and select "Add Block List" to add a
number you would like to block.
2. Select "OK" to save the settings.
Alternatively, tap "Contacts" on Today screen,
highlight the contact you would like to block
and tap "Menu". Select "Set to Block List". You
may also block numbers in Call History, or
create new blocked numbers in Block List.
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