# iphone mystery **URL:** \ **Category:** Factual Questions\ **Created:** [April 21, 2016, 3:58pm UTC](https://boards.straightdope.com/t/iphone-mystery/752824 "2016-04-21T15:58:31Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dauerbach](https://avatars.discourse-cdn.com/v4/letter/d/c2a13f/32.png) [@dauerbach](https://boards.straightdope.com/u/dauerbach)\ **Post date:** [April 21, 2016, 3:58pm UTC](https://boards.straightdope.com/t/iphone-mystery/752824/1 "2016-04-21T15:58:31Z")
As far as I can tell, one number and one number only, when trying to call me on my iphone 4s receives a fast busy signal. When I call myself from a landline it goes through and I receive assorted other calls, so this does not seem to be a systemic problem. What might be causing this? ---
**Author:** ![Dewey\_Finn](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dewey_finn/32/4222_2.png) [@Dewey\_Finn](https://boards.straightdope.com/u/Dewey_Finn)\ **Post date:** [April 21, 2016, 4:27pm UTC](https://boards.straightdope.com/t/iphone-mystery/752824/2 "2016-04-21T16:27:54Z")
Obvious thought: Did you block that number on your iPhone? ---
**Author:** ![dauerbach](https://avatars.discourse-cdn.com/v4/letter/d/c2a13f/32.png) [@dauerbach](https://boards.straightdope.com/u/dauerbach)\ **Post date:** [April 21, 2016, 4:44pm UTC](https://boards.straightdope.com/t/iphone-mystery/752824/3 "2016-04-21T16:44:07Z")
Good thought. First think I checked, and I did not. The specific phone number is in a large institution. No matter who calls me from this place the number of origin is the same. When I have the operator call, it goes right through. I assume she is calling on the trunk line. When someone from inside the place tries they get the fast busy.