That being said, a certain Sony handset has made an appearance on the TÜV Rheinland website which is used to test the safety and quality of devices. While the listing does not actual name the Xperia Z3 in question, some are speculating that this is a possibility. The model numbers that were listed includes the PM-0800-BV (D6603), PM-0804-BV (D6643), PM-0801-BV (D6616), PM-0806-BV (D6653), PM-0802-BV, PM-0803-BV, and PM-0807-BV.
According to Japanese website, Blog of Mobile, the numbers could represent the Xperia Z3, but once again we have nothing that can confirm it. However given that the Xperia Z2 had the model number D65xx, the fact that the listing is for the D66xx, it would not be a stretch of the imagination to think that it could be the successor of the Xperia Z2.
In any case this is pretty much all we have to go on for now, but at the very least it seems that there is a Sony device in testing and we guess we will just have to wait and see what exactly that device is. In the meantime what do you guys think? Could it be the Xperia Z3?