AT&T extends $50 credit for iPhone upgrades purchased through Apple Store
According to the terms of the deal, the $50 credit is applicable to current subscribers who buy any new iPhone model from online or brick-and-mortar Apple Stores, sign up for AT&T's Next financing program and keep the line active for at least 45 days. The promotion was first spotted by MacRumors and confirmed by AppleInsider.
The option is not advertised on Apple's website, but the following fine print does appear when selecting AT&T's Next plan to upgrade an existing line with an iPhone 5s, 5c, 6 or 6 Plus through the Online Apple Store:
Introduced last year, AT&T Next is a specialized payment plan that allows customers to take receipt of a new handset or tablet with zero down, spreading the regular retail price across 20, 24 or 30 monthly installments. Depending on the program, customers can trade in their handset for a new one after 12, 18 or 24 months.
As noted above, the promotion officially ends on Dec. 31, but AT&T reserves the right to discontinue the deal at any time.