hang up after 3 rings - no message

It rang once and they hung up.

same here,   called cell and hung up.

Received a call from this number this morning - let it ring to voicemail.  No voicemail left by caller.  Called the # back & received a recording "Welcome to the Rewards Center.  You have recently visited one of our affiliates websites".  Hung up and blocked this spam phone # & caller.