With Nokia's Lumia line of Windows phones gaining more market share every week, T-Mobile may have just hit a home-run. The company has revealed that it will be the exclusive carrier of Nokia's just announced Lumia 521 smartphone.

The Nokia Lumia 521 is a variant of the 520 that was announced today at the Mobile World Congress in Barcelona. The 521 features a 4-inch ClearBlack, SuperSensitive Touch 800x480 display, wireless charging, 8GB storage (expandable via MicroSD), 1430mAh battery and 1GHz dual-core CPU.

The Lumia 521 will hit shelves at around $200 and could prove to be a decent mid-range device for those looking to test the waters of the Windows Phone 8 sea. Nokia also announced a $20 USD Nokia 105 feature phone with a 1.5-inch screen. It is designed to run up to 35 days on a single charge and is geared towards the millions of people who have no access to the power grid. It also features a flashlight and an FM radio.