T-Mobile today said it will refund the sales tax of smartphone purchases. The limited promotion is available for new devices purchased on a T-Mobile equipment installment plan and associated with either a T-Mobile One or Simple Choice Unlimited 4G LTE service plan. After the sale, customers can fill out a form online and receive a MasterCard gift card for 11.2% of the purchase price of the device, which exceeds the cost of sales tax in most cases. T-Mobile says the sales tax refund promotion can be applied to every phone it sells, and can be used with up to 12 lines. T-Mobile didn't say how long this promo will be available. Earlier this year, T-Mobile rolled the cost of monthly service taxes and fees into its plan pricing in order to simplify billing.


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