AT&T's current Next installment plans are a little bewildering, to put it mildly. Do you want to trade in at 12, 18 or 24 months? How about a downpayment and installments for 28 months? Mercifully, the carrier knows what a mess it made. As of June 9th, it's streamlining its installment plans to give you just two choices. The first, Next Every Year, is for habitual upgraders: you can get a new phone every 12 months if you agree to a 2-year payment plan. The regular option, just called Next, lets you upgrade every 2 years if you're willing to make payments over 30 months.