Sony Xperia Z4

Sony Xperia Z4 has finally landed in Japan. Not that it’s expected to be anywhere else but the Japan-exclusive phone is finally available courtesy of NTT DoCoMo. The carrier has released the smartphone Sony Xperia Z4 (SO-03G) so the Japanese consumers can now order online or pick up the phone in stores. It’s the same Xperia Z3+ introduced to the rest of the world. There’s no key difference except for some improvements in software.

The Sony Xperia Z3+ Xperia Z4 quickly received a firmware update from NTT DoCoMo because of some issues related to a reduction of speaker volume in some conditions. From 28.0.B.0.446 version, firmware build number is now 28.0.B.0.457. That’s an early update but not really surprising because we know there are some heating issues as well.

The Xperia Z4 is offered with a $744 price tag in Japan (93,312 yen, €669, £488). Other mobile carriers are expected to the launch the smartphone in the coming days. Softbank will release the Xperia Z4 tomorrow, June 12, while au will roll out the phone starting today, June 11.

The Snapdragon 810-powered smartphone is expected to be speedy. However, an increase in processing speed may cause the phone to easily heat up. NTT DoComMo was kind enough to release a warning to Xperia Z4 early adopters and suggested the users to do a number of things like turn the power off periodically, turn off phone while charging, do regular data backups, and reduce load to multiple use. The company has also sent a warning that when phone is already high in temperature or shuts down automatically, there is the danger of data loss already.

ntt docomo warning

Qualcomm’s Snapdragon 810 has been controversial taking some heat even if we already said it’s one cool dragon in a review. Qualcomm is already a hot topic when it comes to the heat problem that Samsung decided to ditch it for its own Exynos processor.

VIA: XPERIA blog (1), (2), RB