first of all , good to make a thread like this , i also faced same issue and even water started going inside the phone after aprox 3months of using ,must mention that i put the phone almost every week under the shower(talking) and a few more times filming in swimming pools,so i give it back and first they claimed to repair the back with ordering new back panel . phone was bought in Bulgaria from a company witch headquarters are in Romania, so they had to turn it back to the official service in romania witch is Germanos , after few talks with their manager they change the phone with brAND new , same color , but noticing that the new one witch was brand new , is also little bit raised on the back arounD the camera corners , very very light but stil its more deep in the bottom of the phone than there, thinking to get rid of this XZ while its new and to get the Z2 , shame for Sony to make a hundreds of defect devices. i am happy they give me new , but if i wasnt founD their manager`s number and called perconaly to him i`m sure they would repair and turn it back ,,,shame for sony