Share your experience!
Hello, I have less than a week with my Xperia U and I love it! it's a great and powerfull cellphone, but i can see here that it has many problems, i just have two, a stuck pixel and in the notification bar, when it's in white color (with the theme of "Silk") the righ side has a diferent color, like a pink or something like that, should i ask for my warranty? i'm afraid that if i change it, the new one can have more problems 
take it to a sony repair center
Don't worry,you should take it to SONY Service Center,and they should give a new one.
But, i have seen cases when the new one has more problems
So you say we should keep a broken products instead of change them ?! They have Warranty,you shouldn't afraid of it