(702) 520-1127

This is how I solved it on my (Samsung) cell phone:
1. Go into Contacts
2. Press Add New Contact
3. Type in a name like Zdnc (= do not call) (Z to get it last on your list)
4. Type in the phone number of the annoying caller (in this case: (702) 520-1127)
5. In Ringtone (in this entry) set Contact Tone to No Ring
6. Save it.
My phone will be silent when they call again.

I got a call from 702-520-1127 and it was a robo call when I answered the first time. Then I answered again, same phone number 702-520-1127 and there was some Indian guy asking me about reducing my credit card debt. MAN I HATE THESE TELEMARKETING CALLS!