Prepaid phone expired like 3years, cant remember anything except the phone number, suddenly I am afraid you might charge me on my credit card due to my expiration, will you? I lost phone, lost PIN, lost everything about it.
The only way AT&T may have charged you on your credit card is if you had auto pay or the auto renewal feature set up. Early termination fees do not apply to prepaid GoPhone customers, if that's what you may be thinking. AT&T probably hasn't or probably will not charge you a dime - you probably would have been notified by now if that were the case.