This is a good phone with value for money pricing. It comes with a 5.5 inch screen with 401 ppi. Phone functions smoothly without any lags. Though keeping lots of applications in background may cause lag. Some time the keypad shows a little lag after continous use.
I think this will affect only heavy users. I missed some calls as I was unable to hear the voice in noicy conditions. Anyhow I am satisfied with the perfomance of this device