Deferred Revenue at AT&T AT&T Corporation grants credit to most of its customers. However, a fraction of customers prepay for their wireless services. In addition, the company sells prepaid phone cards and gift certificates. During 2015, these prepaid product lines generated revenue of $4,662 million, and AT&T reported the following deferred revenue liability on its December 31, 2015, balance sheet: $ millions 2015 2014 Advanced billings and customer deposits. $4,682 $4,105 Why would a company AT&T want to offer prepaid wireless? What are the benefits to them as a firm? If revenue recognized from prior prepaid cards in 2015 was $4662, how much was received in cash prepayments in 2015? If prior prepaid cards (have been outstanding for a long period of time) but have no expiration date, how would managers recognize the revenue from them? Deferred Revenue at AT&T AT&T Corporation grants credit to most of its customers. However, a fraction of customers prepay for their wireless services. In addition, the company sells prepaid phone cards and gift certificates. During 2015, these prepaid product lines generated revenue of $4,662 million, and AT&T reported the following deferred revenue liability on its December 31, 2015, balance sheet: $ millions 2015 2014 Advanced billings and customer deposits. $4,682 $4,105 Why would a company AT&T want to offer prepaid wireless? What are the benefits to them as a firm? If revenue recognized from prior prepaid cards in 2015 was $4662, how much was received in cash prepayments in 2015? If prior prepaid cards (have been outstanding for a long period of time) but have no expiration date, how would managers recognize the revenue from them