How big is too big? There is absolutely something to be said about having a larger display on your smartphone, because having that bigger screen makes it so much easier to play games and watch videos, but at what point does a so-called “phablet” become unwieldy? Definitely pushing the envelope in this sector is the positively mammoth Sony Xperia Z Ultra. With an extra large 6.4-inch display, some may say that this superphone is almost comical, but is that such a bad thing?