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I get about 20 robocalls a day, and I'm trying to figure out how to prevent unknown numbers from ringing my phone.

Some ideas:

  • Have a silent ring and assign that to all non-contact callers. There is currently no way to mass assign a ring (to my knowledge), so this would be very labor intensive.

  • Use a Google voice number and let it do all the redirects.

  • Use Do Not Disturb but let text and notifications through from apps I want to use.

Has anyone found a good way to do dodge robocalls?

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  • With regard to callers, you may use Do not disturb and allow calls from all your contacts.
    – not2savvy
    Feb 23 '19 at 0:27
  • The issue with Do Not Disturb is it block notifications. I'm trying to figure out how to block calls from numbers I don't have. I want the phone to work normally otherwise Feb 23 '19 at 3:25
  • Have you tried to block numbers from 0.. (or 9.. depending on the country you’re from)? This could block all calls, but hopefully accept those numbers that are in your phonebook. Haven’t tried it out though.
    – not2savvy
    Feb 23 '19 at 10:39
  • I'm from the US, and most of the robo-calls spoof US numbers :\ Feb 23 '19 at 19:53
  • Then I guess 1 is the digit that is displayed at the beginning of each incoming number and could be tried for a „block all“ entry.
    – not2savvy
    Feb 23 '19 at 21:58
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Thus far, an app called WideProtect seems to do what I want. It allows you to block numbers per area code while still white-listing numbers in your contacts. It's a bit annoying as

  • You can't just block out +1 (xxx)-xxx-xxxx, but most spam calls come from just a few area codes for me

  • You have to go into the app and have it re-whitelist every time you add or remove contacts. A bit annoying, but I've received 20 robo-calls in a day, so probably worth the hassle.

Blocking just my area code dropped my daily robo-call count from 20 or more to 2-3. Slowly adding area codes as I get robo-calls from them. Was able to put my ringer back on.

PS: WideProtect can only block 40 million phone numbers. This sounds like a lot, but when I'm trying to block every number except ones in my contact list it runs out of space fast. Still happy with the product, but won't block everything out of the box.

NOTE: Apple has added "Silence Unkown Calls" which makes this moot

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There is now an option to do this. It’s under Settings/Phone. The switch is named “Silence Unknown Callers”. It sends all calls to voicemail unless the caller is in your contacts.

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