The Eta function allows block all calls numbers that are not on our agenda, so automatic. That is, any call from an unknown number will automatically be blocked to prevent us from being disrupted without having to block calls from each unknown number calling us. Although this possibility still exists if we prefer to block Only the numbers we want.
Steps to block SPAM calls on iOS 13 natively
This new feature adds to the Apple environment the ability to natively block unwanted calls on the iPhone. Calls that will be redirected directly to voicemail so that they do not bother us.
To activate this option, the first thing to do is to have the beta version of iOS 13 on our iPhone and once that's done we open the settings and we go to the option Phone number. We'll find the Disable Unknown Numbers option, which blocks calls from unknown numbers and sends them directly to voicemail. Therefore, all we have to do is slide the switch to the On position.
We need to be very clear: by enabling this option, we can lose some important calls, although the call log is saved in the recent calls list and we can leave voicemails in the voicemail box that we can listen to later. However, it is recommended add all these numbers to our contacts directory of those who do not want to miss any call if we will enable this option in iOS 13.