This number called me three time.  I did not answer because I did not know the number.

I received a call from this number, but I didn't answer..  Thanks God.  I never answer calls from telephones I don't recognize.

this number called me pretending to be at & t  telling me my passcode had been changed I'm not even the primary account holder just a line on the account  They called AT & T pretending to me 20 times until they were able to get in and forward my phone to another number they called and texted me and everyone on our phone plan several times pretending to be at t

I received a phone call from this number but didn't answer it because I didn't hear it. But it was strange to receive a call from such number at 9:36pm on labor day. Thank God I didn't hear it.

I didn't receive a call from this number.  My wireless bill showed an unauthorized $9.99 download charge and mentioned this 1-800-331-0550 phone number in the description along with sms181.com.

Learned by viewing http://www.sms181.com/ ,  this is some service that supposedly gives you 20 lookups for $9.99/mo.   Look up is from cell phone and charge is to cell phone.    I called AT&T (my provider) and they happily got me sorted out and at my request, disabled my internet access (which is where most of these schemes originate).   According to http://www.sms181.com/ , you supposedly can stop this by sending message  STOP to 41479.  I don't know how to do that, but my AT&T rep took care of it for me.