(December 13, 2017, 3:42 PM EST) -- SAN FRANCISCO — A Ninth Circuit U.S. Court of Appeals panel on Dec. 11 upheld a ruling compelling arbitration in a class complaint brought by wireless customers who allege that AT&T Mobility LLC purposely slows data for “unlimited” customers, finding that there is no state action in the case and awarding costs to AT&T (Marcus A. Roberts, et al. v. AT&T Mobility LLC, No. 16-16915, 9th Cir., 2017 U.S. App. LEXIS 24946)....