A man with a foreign accent (perhaps Indian or Pakistani), obviously working in a call center as evidenced by the background noise, stated that he was from Khan Services. I didn't fully understand him because he was talking quickly, but he said something about how I paid my credit card bills on time and asked which type of card I had. I didn't tell him, partially because I didn't catch the question. He then asked how much I owed on my card and I said "nothing." He wrapped up the call after that and we hung up. He was friendly and seemed to have taken some kind of notes during the call.
I had asked what "Khan Services" was and he gave a vague answer about credit card service. I've found a few companies registered under that name, but none were located in Miami and none even remotely fit the bill otherwise. I'm not sure what they're after, but I must have not been the type of target they were looking for.