In a market dominated by giants Verizon and AT&T, one advantage No. 3 carrier Sprint has is its unlimited data plans. However, according to a recent BriefMobile.com report, those days may be soon coming to an end.

Based on images leaked by the news provider, Sprint is planning to introduce new tiered data plans for non-mobile phone devices, including tablets, mobile hotspots, netbooks and USB cards.

While the news may come to the dismay of many Sprint subscribers, the new data plans actually knock off about $10 from their regular prices. Three-gigabyte plan customers will be able to subscribe to plans for $34.99 a month, while 5GB and 10GB data plans will cost $49.99 and $79.99, respectively.

Based on the image, it is not clear whether the plans will apply to 4G networks or for smartphones and mobile phone accessories. As of now, Sprint offers unlimited data plans for mobile devices, as well as certain broadband devices.

According to BriefMobile, the new plans will be officially announced on May 8.

Sprint is currently facing an uphill climb in the U.S. mobile market, particularly with the pending AT&T takeover of T-Mobile. However, according to a recent Chitika report, Sprint accounts for 25.3 percent of the Android market share – currently the leading mobile operating system in the United States.