Got a call from +18666122490, is this a legit care number?

So, I got a call from the number, +18666122490, stating that they called from Tmobile and wanted to survey my experience with Tmobile. The person wanted to verify what my name was on account and my pin, obviously I did not provide any. She then went ahead to send a "Personal Guarantee " text that came through the usual Tmobile 4 digit number, 5116. This was so confusing for me to believe whether this is a legit number, she then proceeded to ask questions that were not any sort where I would be exposing my account details.

Not sure whether this was a legit care call or not; anyone had experienced this before?