Called my cell phone.

Missed their call and when I called back there was no answer and no answering machine.

I had the same issue as yours, they missed called me only like two rings and when I called back just no response or any answer machine ! I think it just a spam call

Two rings,called back no answer jarrassing!

I also recieved a call, did not answer in 2 rings, they hung up.  Called back, no answer on their end.  Seems like a robot looking for valid number.  Recommend: do not call back.