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 :::Missing calls to communicate a phone number seems within scope of the current article (deliberately missing calls to communicate information), but is there much to say about accidentally missed calls? If all we've got is a one line ""it's when you miss a call, accidentally"" and 99% of the article is then about the interesting abuses of that system, we're not doing the reader any favours if we present this article as being about both subjects. 
 :::I wasn't suggesting a full disambiguation page, just a hatnote of ""This article is about deliberately missing calls to communicate information. For accidentally missed calls, see X."" - where X is a suitable article for mentioning accidentally missed calls in passing (perhaps Telephone call#Placing a call).   "