SIM locked and my Iphone 4 is asking for a PUK code. I am not sure what I did but I was looking through settings and I must have pushed the wrong button. Any help would be appreciated.
You'll have to call customer care (1-800-331-0500) or go into the store to get a PUK code.
Read this article and you can get your PUK code yourself: https://www.att.com/esupport/solutionDisplay.jsp?solutionId=KB617
Do not guess at the number too many wrong attempts and your SIM will be deactivated and you will need to go to a store for a new one.
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