I got a missed call on my cell phone from this number today. I didn't know who it was so I decided to search for the number online. After reading some of postings above, I think I figured it out. I bought a new phone from T-Mobile yesterday and I was told that I may be contacted by their office for a customer service survey. It is supposed to be something that they do randomly to ensure that their sales associates are doing their best.
Just got a call from this number looking for someone that was not me. I was curious and asked who they were. They said their name was CNS and they were a market research company and this was not a sales call.
Received call from this number-woman asking for the office manager. Said no thank you we don't accept solicitations and hung up. They called right back and I put them on hold. When I went to answer it, they were gone.
Suggest tying up their annoying calls by putting them on hold if you have a spare line.