Who called from 4432528244

called me twice in a row, didn't leave a voicemail, can't call back

The same. Several calls on cell phone without message.
If you call back from public phone, recorded message will ask "if you wish to place your number in do not call list..".
I added this number to "auto reject list".

same as above.  no message. obviously a junker.

Called and hung up on me.  Obviously a scammer

Called 1602 7/31/15. I did not answer. Left no voice mail.