T-Mobile US has announced that it will offer at least a million cellphone users the opportunity to use an Apple Inc iPhone in a free one-week trial of the No. 4 U.S. wireless carrier's network with unlimited access.

The announcement is just the latest promotion from the wireless carrier, which in 2013 shook up the industry by unbundling service fees from device costs, which caused other carriers to do the same.

Customers can sign up online, receive a free iPhone 5s in two days and pay no charges unless the phone is not returned one week later or the device gets damaged, according to Reuters.

"We believe every Verizon, and every AT&T customer should cheat on their carrier and enjoy every minute of it," said T-Mobile CEO John Legere, speaking at a T-Mobile event in Seattle that was streamed live. 

T-Mobile's massive discounts in the first quarter of 2014 also won it more subscribers than any of the other wireless carriers combined. T-Mobile's discounts have led to a restructuring of pricing plans across the wireless industry.

The company's price slashing cost it $151 million in lost revenue during the first quarter however.

Music streaming from eight major music providers, like Spotify and Pandora, won't count against the data allowance included in consumer's subscriptions as well, according to T-Mobile.

"Streaming music is a showcase of what makes our network different. We can handle it," said T-Mobile Chief Marketing Officer Mike Sievert, according to Reuters.

T-Mobile customers use 69 percent more data than Verizon, and 100 percent more data than AT&T, according to the wireless company.

T-Mobile also launched a music streaming service recently called "unRadio," in partnership with music provider Rhapsody, which is free of advertising and will be available for customers who have unlimited high speed service.

The service will be available for $4 a month to other subscribers as well, according to Reuters. 

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