Calls several times a day and never leaves message.

I get some issue.. I work for sprint. And even was using a sprint test phone and receved call on it(I didn't send/receive and calls on device either)best resolution have number blocked...spam.

This phone # keeps calling me and a machine asks for someone i never heard of before.

GET CALLS FROM THIS # AND THE 7210# ALSO.  DON'T KNOW WHO IT IS OR WHY THEY CALL. I HAVE THEM BLOCKED BUT THEY LEAVE MESSAGES, BUT NEVER LISTEN TO THEM