The new sony xperia z ultra is a good phone. But has a bit of problems. The phone comes with a 13 mp back camera without flash. It doesnt support low light image. The latest update of the phone that is the android lollipop has a bug in its user interface, the lockscreen doesnt appier when the lock button is pressed but a black screen with green lights does and ther the lockscreen comes alive
These are the problems I faced while using the phone but over all the phone is nice