Who called from 8018775855

"how do you block numbers on a cell phone"

In most cases, you don't (unless the provider will do it for you or you have an ap that does so) but what you can do is make a contact and add the numbers to said contact and set the ringtone to vibrate or silent

THEY KEEP CALLING AND HANGING UP WHEN I CALL BACK THE PHONE IS ALWAYS BUSY.

Caller said he was with Family Protection Service and wanted to "give" me a free TV and all I had to do was allow them to advertise and they would also install some type of alarm system. Told them I was on the DO NOT CALL list (as good as that is) and to not call me again. Caller hung up.

use google voice.

801-877-5855 called my phone. I didn't answer but called back from different phone and got a busy signal.