The fake website: hxxp://www.MyATT135.com looks exactly like the legitimate AT&T website: http://www.att.com/. Therefore, whatever you do, do not enter your AT&T sign in or login information on this malicious website.
If you try to sign-in to this fake website by entering your userID / cellphone number and password, it will be sent to the scammers behind this bogus website. With your sign-in information, these people will be able to gain access to your account. With access to your account, they may deactivate your device, add their own and rack up international calls and internet usage. They may also steal your identity.
If you were tricked into entering your sign-in information on this malicious website:hxxp://www.MyATT135.com, please change your password. If you are unable to change your password, please contact AT&T by telephone.
Scammers will be creating more bogus websites and phone recordings to lure persons into their traps. If you receive any e-mails, text messages, or phone calls claiming that you have won something and that you need to go to a particular website in order to claim your prize, please contact AT&T to verify this promotion.