The design is good but initially its performance was so bad fps was so slow but after make an update it was running better. But before update its biggest problem was heating issue after continious using about 20mins it heated up so badly. The camera quality was so bad in night, battery buck up was the worst thing of this phone. after upgradation to kitkat it runs fast but battery and camera become so dull. After full charge it hardly give a stand by of 10-12 hours with normal usage like ph calls sms chating. Which can easily make you disappointed.
