It's to get you to call back and hang around waiting for an answer while they charge £££ to your bill..
I feel blessed... I got up to 4 rings before they rang off. It;s around 3pm and ttraditionally this is the kind of time I tend to get Indian call centre junk calls.
I'm beginning to see the attraction of dumping a landline altogether. I can set more rigorous controls on my mobile.
Called my landline, 3 rings then stops. Have blocked this number on my handset so won't be bothered again.
Same thing, rang three times then cut off
Ditto. Rang today and hung up after 3 rings. Silly people.
Same as Magpie - rang then put down on answer - suspicious
Rings 3 times then stops. Very annoying to be disturbed needlessly.