(Telecompaper) ZTE will unveil a new large-screen Android smartphone and its latest Firefox phone at the Mobile World Congress. In a preview of its handset offering in Barcelona, ZTE said it will present the Grand Memo II, a LTE phone with 6-inch screen. This is successor to its flagship smartphone launched last year at MWC. The Chinese company will also show with Telefonica the ZTE Open C, the first phone to run Firefox OS 1.3. In addition, ZTE is showing the latest version of its user interface, MiFavor 2.3. Other devices on display will include the Grand S II flagship smartphone, the ZTE Blade series and the Nubia series. ZTE said the new Nubia 5S and Nubia 5S mini outsold all other phones on the online shop Jingdong.com in December, including those from Apple, Samsung and Nokia. The company will also show products launched at CES, including the Projector Hotspot (a mini projector and Wi-Fi hotspot in one) and the ZTE Grand Watch Smart Watch.