I suggest reporting conversations with this number to the FBI's fraud investigation team. I have already done so. It's really easy to report suspected fraud to the FBI using their single-page online form that can be submitted on the internet. It only asks a few questions - the phone number and/or company you are reporting, and a few questions about basic information about you. You can include an optional message, but are not required to do so to report the suspicious calls.
I answered a call from this number. After a brief moment of silence the caller asked, "Is this (xxx) xxx-xxxx?" I laughed as I pointed out that she obviously knows what number this is, since she dialed it. I stopped laughing and demanded to know, "What do you want?"
She claimed to be a representative of my computer's repair company. This made me laugh even harder and louder as I retorted, "No, you're not!" My roommate raised an eyebrow. Still laughing, I began to explain "This girl first asked me if the number she dialed is the number she dialed. Now she's actually trying to pretend my computer told her to call me!" I promptly disconnected the call.
She immediately called right back. She asked if I spoke Spanish. I said no, and she repeated the question. I asked, "Why? You speak English, don't you?" She denied that she did, in English (maybe Eastern, or Middle Eastern, accent).
In spite of my raucous laughter, I heard some line interference and then a man's voice. She had dialed another number while I was still on the line (probably a glitch in the software-based phone dialer call centers use and that she might be using as well). I explained to the gentleman that our unsolicited caller was obviously full of it and sounded like a scam. I then disconnected the call.
She called again immediately. She demanded to know, "This is not a scam! Why did you tell him this was a scam?" (in clear and perfect English, of course). I heard the line interference again, the same gentleman said, "Can I help you?" I told the gentleman that I would be reporting her calls to the FBI for investigation for suspected fraud. I don't know what she was shouting about as I disconnected the call.
I may be mistaken, but it is my understanding that unsolicited calls to a cell phone are illegal. You can report it to the FBI here: https://tips.fbi.gov/