You need to purchase one Samsung Superphone (like the Galaxy S7 or Note 5) and add another phone line to qualify for the sale.
Buy one phone, get the second free.
T-Mobile will run a one-day sale on Saturday, August 6, giving customers who buy a qualifying Samsung Superphone a second device of equal (or lesser, if you prefer) value, according to the company.
The promotion follows a week of celebrations by the company after OpenSignal and others crowned T-Mobile the fastest wireless network in the nation. You need to purchase a Galaxy S7, Galaxy S7 Edge, Galaxy S6, Galaxy S6 Edge, Galaxy S6 Edge+, or Note 5 with T-Mobile's monthly payment plan (Equipment Installment Plan) and add a second line of service to be eligible for the sale.
The deal will be available in every T-Mobile store and online, according to the company.