T-Mobile USA Inc said on Wednesday it will begin selling its new 3G-enabled Dash smartphone in July, yet another entry in the hotly contested mobile phone segment.

T-Mobile said the Wi-Fi-enabled Dash 3G was designed by HTC, runs on Microsoft's Windows Mobile and features a full QWERTY keyboard.

The company said pricing was not yet available.

T-Mobile is a unit of Deutsche Telekom.

Research in Motion's BlackBerry and Apple Inc's iPhone dominate the high-end smartphone market, while Palm Inc's just-released Pre has also seen strong demand.

(Reporting by Gabriel Madway; Editing by Gary Hill)