This happened to me with AT&T herein Mexico: I have an AT&T pre-paid sim card that expires after a year. At the end of the year I got a call supposedly from som

This happened to me with AT&T herein Mexico: I have an AT&T pre-paid sim card that expires after a year. At the end of the year I got a call supposedly from someone form AT&T and told me about some special discount offer if I pre-paid for another year. The catch is that I needed to pay over there by phone ... (give my card details). I told her that I preferred to call the AT&T number and for her to tell me what options should I press to get to her. She couldn't give me an answer to that. Most likely a scam I guess.