Sony Xperia Z4 has Android as its operating system so you can download Whatsapp Messenger application on your Sony Xperia Z4 for free and connect with your friends and family. This free app just needs an internet connection to keep going. You can send unlimited messages and other multimedia messages like images, audio files, videos and much more to your contacts. This is indeed a top quality smartphone and you must go for it.
As Sony launches an updated version of its phone after every six months, we can predict that Sony Xperia Z4 is likely to be released any time soon. Till now, the brand has not been able to put 4K video capabilities, so we can expect that it would be installed in this new version. You can expect 4GB of RAM, a Snapdragon 810 processor and of course, better version of Xperia Z3. The phone is expected to deliver more power and a few bugs. For now, you can just wait and hope for the best.