Rang once then hung up. Busy signal when I called back. PESTS!

they called my cell, rang once and hung up.

This number keeps calling my cell phone rings and leaves no message~I am sick and tired of it.

Its probably possible to block calls from this number.  Ask your carrier how.

Or put this number in your contacts list and assign it the ring tone "no ring".  That will send the calls to voicemail without bothering you.

Called rang twice and hung up. No message. Steer clear.