LOS CLIENTES NUEVOS Y ACTUALES PUEDEN OBTENER HASTA $800 DE DESCUENTO EN SMARTPHONES ELEGIBLES: oferta por tiempo limitado. You'll need to: * Purchase an eligible smartphone on a qualifying installment agreement, including taxes on full retail price (up front) and $35 activation/upgrade fee. * Activate/keep postpaid eligible unlimited voice \& data wireless service (min. $75/mo. for new unlimited customers before discounts). AT\&T may temporarily slow data speeds if the network is busy. * Trade\-in an eligible smartphone in good working condition within 30 days of activation. Then you'll get: * Up to $800 in bill credits with smartphone trade\-in value of $130 or higher. * Up to $350 in bill credits with smartphone trade\-in value of $35 to $129 Important notes: * Credits start within 3 bills after trade\-in is completed and will be applied in equal amounts over the term of installment agreement. You will receive catch\-up credits once bill credits start. Credit will not exceed the lower of the device cost or the max credit amount as defined above. * If you cancel wireless service, your credits will end and you'll owe the remaining balance on the installment agreement for the device purchased. * For new lines, if you cancel service on any other line on your account within 90 days of activating the line under this offer, device credits will stop. * If buying on the AT\&T Installment Plan with Next Up, customer is responsible and will not receive any credits for the additional $6/mo. Next Up upgrade feature.