I want to purchase a new android smartphone and after checking the websites and specs of various mobiles i have shortlisted three mobiles:Qmobile noir A8Sony xperia U Sony Xperia solaMy budget is 20K. My requirments are that there should be no lag in switching between homescreens, can play decent games(not high requirment like gTA 3 etc.), should have a good enough camera and that I would never need to root the phone. Also the bigger the screen, the better( really a fan of huge screens) because I read ebooks.So a/c to these factors tell me which is the best phone. Also if you can recommend another in my range, I'm all ears.