We agree that your 4-digit passcode--which is required to use the myAT&T app, access your account online, over the phone or in the stores--should not be the last four digits of your Social Security Number or any value that someone who knows you might guess. If you have already set your wireless account passcode, please take a look at Changing your Security Passcode. If have not set your passcode, then you should have recently received an email from AT&T about it. The link in that email lets you set your passcode for the first time.
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