repeated calls and did not leave any  message

Its sprint survey  call

This is a SPRINT SURVEY CALL.  I called the number back, and that's what it is.  I DONOT answer any numbers that I do not know.  This one of those numbers.  So I blocked my number and called them back, and it was as Myz stated, it is a Sprint Survey Call.

I have had repeated missed calls from this number when i did a reverse phone number look up it is a house phone number. I won't be calling it back and won't be doing no survey either that is just to weird for me. and they left a 3 second message and it was in spanish i don't speak spanish.