The law firms of Folkenflik & McGerity and Hoffman & Lazear have filed a $1.2 billion class action suit on behalf of iPhone owners against Apple and AT&T Mobility (AT&T’s cellular unit) in US District Court. The case, Paul Holman and Lucy Rivello v. Apple, Inc., AT&T Mobility, LLC., claims that the companies’ agreements to restrict iPhone users to using only the AT&T cellular network for voice and data, and to restrict…