I picked up the call, but the line went dead straight away.

I let it ring as I always do when it’s a number I don’t know.

It just keeps ringing incessantly until you pick up the phone.

Received a call earlier today, and upon picking up, it felt like they all ganged up on me.

Keeps calling me incessantly!

I've had several instances where these callers just ring, remain completely silent, and then abruptly hang up. It's rather infuriating and happens far too often!