Any Sufficiently Advanced Technology …

… is indistinguishable from magic. According to BBC News:

A rumour has spread rapidly in the commercial capital, Lagos [Nigeria], that if one answers calls from certain "killer numbers" then one will die immediately.

A BBC reporter says experts and mobile phone operators have been reassuring the public via the media that death cannot result from receiving a call.

[…]

The BBC's reporter in Lagos, Sola Odunfa, says that the current scare story is reminiscent of a rumour that spread a few years ago that a handshake could cause sexual organs to disappear.

That rumour turned to tragedy as mobs rounded on people accused of making organs disappear.

I wonder how one qualifies as an "expert" in mobile phone death ray technology.