quotation marks omitted). This principle is set forth in Section 2 of the FAA, 9 U.S.C. § 2, which provides that an agreement to arbitrate “shall be valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract.” Section 2 is “the primary substantive provision” of the FAA which “create[s] a body of federal substantive law of arbitrability, applicable to any arbitration agreement within the coverage of the” FAA. Moses H. Cone Memorial Hosp. v. Mercury Constr. Corp., 460 U.S. 1, 24, 103 S.Ct. 927, 74 L.Ed.2d 765 (1983). We join other Circuits that have evaluated arbitration clauses containing class action waivers under the federal substantive law of arbitrability. See Gay v. CreditInform, 511 F.3d 369, 394-95 (3d Cir.2007) (<HOLDING>); Kristian, 446 F.3d at 63 (“Although
holding class action waiver contained in cellular telephone unconscionable under washington law holding class action waiver in cellular phone contract unconscionable under california law holding class action waiver in cellular telephone service agreement unconscionable holding the class action waiver provision of cellular telephone service contract unconscionable holding class action waiver to be enforceable under section 2 of the faa notwithstanding claim that waiver was unconscionable under state law