call block doesn't work

[Holmes333]

Guys can anyone tell me,

When I turn on BLOCK UNKNOWN CALLERS it doesn't works in my Samsung a30 and A30s mobile.?

[surendraKT]

it works well, may be you can not find activation button

[Holmes333]

I think I did it well. can you explain it please.?

[Holmes333]

in a short way I just want to ask, if I want to block all numbers that aren't saved in mobile so what should i do.?

[Samsung_Support5]

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve this issue kindly follow the given below step:

>>> Reset the device: settings >General Management > Tap on Reset.
Note: Before reset make sure to have back up of the data via Smart Switch Mobile App
(Install Smart Switch App > Open > Click on Memory Card Icon >Back Up option > Choose the data for Back up > Back Up).

If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report) along with video or screen-shots. This will help us to further investigate and resolve your concern.

Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support