got message on cell phone today - recording re: legal rights if problems were encountered with the drug Avandia - like a class action type suit.  called at noon.....how to get these calls to stop!!!! this took up precious time on my prepaid cell phone.

got call from this number 4891-6748. can't call it back. left no message.

got a call from this number and don't know what its about. Didn't leave a message. Can't call this number back.

they called me at school and got my phone takin away

I answered, and got nothing, not even white noise.