A true breakthrough in multi-use screen technology. The Sero is made for those who wish they could super-size their phone. Flip the screen vertically or horizontally C landscape mode is best for movies and television. while portrait mode makes mobile content or apps a big-screen enjoyment. With 4K upscaling. 100% colour volume display and 4.1-channel built-in speakers. your favourite games. films and apps look and sound their best from any angle.