How to blacklist Sino-Sino G0 19?

1, press and hold the blacklist key until the number in the upper left corner becomes 0 1, and no codes or other phone numbers will appear on the main screen.

2. Add a blacklist, enter the blacklist number and press Set/Set.

3. Press the up and down keys to change, and the number in the upper left corner will change, from 0 1 to 10, representing different blacklists. A total of 10 blacklists can be set.

4. Delete the blacklist. Select the blacklist and press Delete /del. The deleted blacklist shows no code.