Related Clues:

• AT&T, once
• Ma Bell purchaser
• ADA, for one
• Pioneering cell phone co.
• One-time AT&T rival
• Old AT&T rival
• Many a defender: Abbr.
• Former phone co.
• QB's pass, completed or not
• Verizon rival, initially
• Co. that purchased AT&T in 2005
• Part of a 2005 SBC merger
• AT&T rival, once
• Court V.I.P.: Abbr.
• Telecom co. of yore