They've called me 5 times in two days. I've answered once and it hangs up immediately after you've answers. Probably a company testing which numbers are active. I've now blocked them!

Caller: Getting calls frequently

When I pick up call they hang up. Getting almost alternate days since 2 weeks

Caller: RECEIVED 2 CALLS FROM THIS NUMBER TODAY 13:50 HRS & 16:36 HRS

RECEIVED 2 CALLS FROM THIS NUMBER TODAY 13:50 HRS & 16:36 HRS
I answered both times but no one responded each time. I have blocked the number.

This caller is testing active numbers to on-sell user information to other telemarking organisations.

Scam call; when you answer they hang up - testing for active phone numbers

Caller: No one speaks

Received a call from this number. Didn't recognise it. When answered there was just silence.

didn't pick up