If you are unable to sign in to your ATT account then it can be the hacking attack. You must change the password. To fix the ATT hacked account issue, you have to visit the ATT website firstly. You need to type full email address in the given space. And you need to choose my profile tab in the next step. Then, you need to set a personal password segment. You need to type old password under current password section. Next, you need to type new password. You need to type it again to confirm it is correct or not. To know more, feel free to contact experts.