Who called from 7632607660

Received a phone call on my mobile phone. Left no message.

Also from the 763 area

Recieved a call, no answer, no voicemail

Recived a call in the middle of school
No message

Caller said that I had completed a survey online, stating that I was interested in finding a position, and that if I qualified could win a Wal-mart gift card... also asked about if I would consider going back to school - and working - if I qualified.  Call got disconnected, am not sure if I lost the signal, or if he hung up.

received a call, answered, nobody there