I purchased it for brand name but that was a mistake.. heavy weight, poor battery, average 23mp camera, no customized android UI, no android updates and runs with lollipop.. Now I am using OPPO which is 3 times better than Sony Xperia ultra duo
What else is required from a phone. With over a year of use, it's camera, sound and screen are still way better then the most cell phones in the market. Battery is a concern, with heavy usage you might need to charge it before you leave back to home. The movie experience is a delight. Sound is pure pleasure and camera is just brilliant. With 6inch screen, it's a pleasure working on the phone for almost all type of work.