unknown caller occurs when the phone companies do not exchange caller ID.
This can happen for two reasons :
(1) The companies do not have a commerical arrangement in place.
This happens in New Zealand with our two main mobile operators. You can call each other on different networks of course – but due to a “spat” about the commerical advantages of caller IDs they don’t switch them between networks.
:plain:
(2) Phone system incompatiability
Overseas calls to my landline ALWAYS seem to result in the caller ID being exactly “00000” …
sigh.gif
With the US being 100 times more complex – I can imagine that it’s one of thse two scenarios …