(a) immediatelynotify AT&T if you suspect any breach of security such as loss, theft, Public Use, or unauthorized disclosure or use of your Member Account or Sub Account, password, Member ID, or any credit or charge card number provided to AT&T by calling:</p> <p>800.288.2020 for AT&T Internet and AT&T Fiber consumer subscribers and Fixed Wireless subscribers</p> <p>800.321.2000 for AT&T Internet for Business, AT&T High Speed Internet Business Edition, AT&T High Speed Internet Business Edition Direct and/or Fixed Wireless Internet business subscribers</p> <p>855.220.5211 for Access from AT&T in English (855.220.5225 for Access from AT&T in Spanish)</p> <p>