The Japanese OEM is posting signs throughout one of its offices demanding "No more leakage!". The positing encourages those who handle confidential smartphones to "strictly follow prototype usage rules," which means that they are not to be used without a protective cover that also hides the phone from spying camera lens. Prototypes are also not allowed to be shown to the outside world unless the person who the device is handed to signs a non-disclosure agreement.
In addition, no pictures are allowed to be posted on "social networks, public web pages, etc." Lastly, no third party apps are allowed to be installed on the prototype so as to prevent mobile ad networks from finding it on their logs. We've already had some leaks about the Sony Xperia Z2. But one of our loyal readers told us that the manufacturer will no longer introduce new flagship models at CES which might actually have something to do with the tightening up of Sony's prototype handling rules.
source: XperiaBlog via SlashGear