 The Vivaz and the Sony Ericsson Satio are the last Sony Ericsson phones to run Symbian.After that, all Sony Ericsson smartphones run Android under the Xperia brand.The Sony Ericsson Vivaz Pro has a few differences from the Vivaz, such as a downsized 5-megapixel camera with HD video recording, a slide-out QWERTY keyboard and a larger-size device (109 x 52 x 15 mm, 117g).