I bought a new Sprint pre-pay phone and hadn't given my new number to anyone. The number above called me twice in a week, left no message, and hung up so I blocked the party from ever calling again.

Recieved a call... It "rang" for about 10 seconds, then right when I clicked the icon to answer it, it hung up.

Received a call at 12:50 pm, rang once and hung up. Had our number and provider for years.

Called and didn't leave a voice mail

Rang once and hang up.