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block a number

191017 Views 26 Replies Latest reply: Jul 26, 2013 11:10 AM by Michael Black RSS
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dalman88 Level 1 Level 1 (0 points)
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Jun 2, 2012 1:49 PM

How do block an unwanted number?

iPhone 4S
  • wjosten Level 10 Level 10 (91,440 points)
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    Jun 2, 2012 1:54 PM (in response to dalman88)

    Contact your carrier, as only they can truly block calls. There is no setting on any iPhone to do so. Some carriers ofer call blocking, some don't, but that is the only way to truly block calls.

  • GZukes Level 4 Level 4 (1,565 points)
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    Jun 2, 2012 1:54 PM (in response to dalman88)

    Call blocking is a carrier function.  Contact you carrier for more information.  No apps are available that will do call blocking at the iPhone level.

  • gemma_hibs Level 1 Level 1 (0 points)
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    Aug 14, 2012 5:22 AM (in response to dalman88)

    It is possible to block numbers on the Iphone, all as you have to do is download the 'Iblacklist' app for the iphone and you can add as many numbers as you wish to this. The only down side is this app will cost £1.49 but well worth it.

  • Meg St._Clair Level 8 Level 8 (37,475 points)
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    Aug 14, 2012 5:40 AM (in response to gemma_hibs)

    iBlacklist, the app with not a single rating over 1 star? Every single review says it doesn't work. You consider that money well spent?

  • ckuan Level 6 Level 6 (19,885 points)
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    Aug 14, 2012 5:43 AM (in response to Meg St._Clair)

    Maybe he's the developer

  • Meg St._Clair Level 8 Level 8 (37,475 points)
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    Aug 14, 2012 5:56 AM (in response to ckuan)

    In which case I feel very sorry for them.

  • Imegz Level 1 Level 1 (0 points)
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    Nov 13, 2012 6:00 PM (in response to dalman88)

    Try the app "the bad decision blocker "

  • GZukes Level 4 Level 4 (1,565 points)
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    Nov 13, 2012 6:27 PM (in response to Imegz)

    The app you mentioned will not block incoming calls.  The description of the app clearly states that Apple will not allow this.

  • franetic Level 1 Level 1 (0 points)
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    Dec 12, 2012 9:14 AM (in response to dalman88)

    Try searching truecaller on iphone apps, I just downloaded it and logged a spam number, its now stored and blocked on my phone book. and its FREEEEE

  • Michael Black Level 6 Level 6 (17,835 points)
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    Dec 12, 2012 9:45 AM (in response to franetic)

    People need to be aware of how apps like TrueCaller really work.  They actually put your phone number and contacts into their database.  When a call comes in to your phone, TrueCaller app will allow it if it is in your contacts, but if not, it opens a data connection (free if near a wifi node, but it will use your cellular data plan if no wifi) to see if it is in any of their lists to block.

     

    So be aware, you are allowing the company access to your number and your contact information, and you may use cellular data in order for the app to work.

     

    And also note, it does not truly block a call - every call connects, long enough for TrueCaller to check it against your contacts, or its lists if not found in your contacts.  And if the call is coming from someone who has blocked their caller id, then it will ring through, as the app has no data to capture to use for lookup.

  • Michael Black Level 6 Level 6 (17,835 points)
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    Dec 13, 2012 4:57 AM (in response to dalman88)

    dalman88 wrote:

     

    Thanks Michael.  EVERYONE needs to understand that before an app can block a call, it has to come in first.  Apparently how that is done is up to the app!  Don't want some third party to have my contacts in their data base.

     

     

    dalman

     

    Of course, this is why myself and others try to get people to realize that true call blocking (where the call NEVER connects to your handset at all) can only be done by the carrier at their actual switches.  If that service is an option from your carrier, that would always, to my mind, be a preferable solution to any blacklisting type app (which must allow the call to connect at least long enough to capture the caller ID information).

     

    If you would like to see blacklisting added to iOS, then submit your feedback to apple:

     

    http://www.apple.com/feedback/

  • t4gey Level 1 Level 1 (0 points)
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    Dec 13, 2012 5:03 AM (in response to dalman88)

    I agree here, it's only software. I saw a demonstration online with a jail broken iPhone that had a copy of iblacklist from cydia store and with this you could block unwanted calls and texts at will. Why is it such a problem for apple to sanction this to be sold in the App Store? I would gladly pay for it unlike the fakes that are in the App Store claiming to do this and are a complete waste of money. Forgive me for swearing please but the galaxy S3 has this function so what has been posted earlier about only the carrier can truly block a number is wrong.

  • Michael Black Level 6 Level 6 (17,835 points)
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    Dec 13, 2012 5:25 AM (in response to t4gey)

    No, blacklisting is not literally the same as call blocking.  The Galaxy and othes use blacklisting - an app (3rd party or part of the OS) has to allow the call to connect so it can use the caller ID to check the number against its allowed or disallowed list.  While it may mute the call during the list lookup, and then drip the call if it is in the block list, the call does have to go through to your handset for it to work.  A caller who blocks their caller ID defeats blacklisting software as it never gets the caller ID to use to lookup against its lists.

     

    With true call blocking, your service provider intercepts the number at their swithes, and it is never allowed to go through to your handset.  Even a caller who blocks their caller ID will not go through, as the carrier's routing software always has access to the caller ID information, regardless of whether the caller blocked it or not.

     

    No handset can execute a true call block - all they can do is use the caller ID to drop a call once it has connected.

     

    P.S. for those who've never tried it, this is one advantage of google voice - GV has a spam filter where you can add callers you wish blocked.  For those, the Google Voice system identifies them when they try to call, and simple hangs up on them instead of ringing the call through to your handset.  That also means they are blocked on any and all numbers you forward your GV number too, not just one particular handset.  Personally, I wish the cell service providers would just enable an analogous feature on your account web page - they could do so if they wished.

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