Buy One Get One Free Promotion

Chances are, if a state was excluded, there is some law or requirement in the state that prohibits such a deal.

I assumed this was the reason, but I'm sure ATT could come up with some alternative deal that are within the laws of the three states excluded.

since next is a loan some states have different rules.

If you read the fine print you have to keep the both phones active for 30 months and cant trade in early.  not a nice trade off if you ask me.

¹Buy One Get One: Offer ends December 31, 2015. Void in Connecticut, Rhode Island, and Miami-Dade. Devices: Includes select devices only. Must buy on installment agreements. Taxes on full retail prices due at sale. Down payment option available. Service: Qualified monthly wireless service (voice and data) required on both (currently minimum $70 per month on Mobile Share Value). Bill Credit: Both lines must be active and in good standing for 30 days for credits to start. Get up to $650 in 30 monthly bill credits of up to $21.67 starting within 3 bills for installment payments. Eligible device is free after remaining on AT&T Next agreement with qualified service for 30 months (if you cancel service you will owe remaining installment balance of up to $650). If upgrade or pay up/off agreement early your credits may cease. GENERAL Wireless Service Terms: Subject to Wireless Customer Agreement (att.com/wca). Credit approval required.Deposit: May apply per line. Device Limits/Exclusions: Purchase limit and limit on total number of financed devices per account apply. Prices may vary by location. Return/Restocking: If you return one device you are not eligible for offer. Restocking fees of up to $35 each. Taxes, fees, overage, monthly, and other charges and restrictions apply. Pricing, terms, and restrictions subject to change and may be modified or terminated at any time without notice. Coverage and service not available everywhere. Other restrictions apply and may result in service termination.