A really useful application, thanks for this.

Installed from package manager, received an undesired call and hang it using the Power Key button. No problems.

Then I received again a call from the same number and Callerx didn't block it.

I have checked the blacklist file and the number was there, no dashes, no symbols, it's a known number, nothing special.

I have checked that the service is running with ps -fea |grep callerx, and then add a testing number to the file. The testing phone wasn't blocked as well.

Restarted service and manually loaded the blacklist, now it seems to work fine. Is it possible that the autostart script is not loading the blacklist correctly? or file changes are not noticed?

Another question, is it possible to avoid the notification of a missed call received after blocking the call?

By the way, it would be funny for those ad calls to actually pick up the phone, reproduce a previously recorded message, something like:
"Yes, it's me"
...wait for a minute
"Oh, I'm very interested, explain it to me with more detail"
... wait for five minutes
"this is a recorded message that made you lose your time. Annoying, isn't it? So it is to receive these calls"
hang