Sony has never really been the fastest off the blocks when it comes to rolling out software updates for its devices, but the company is now finally pushing out Android 6.0 Marshmallow to its discontinued mid-ranger, the Xperia C4. The device was originally launched last year with Android 5.0 lollipop on board and marketed as a 'selfie-expert' thanks to its 5-megapixel front-facing camera, which was still a bit of a novelty back then. As mentioned already, Sony has already discontinued production of the device, and sections of the media also expect the company to completely do away with its C line now that the company, after years of losing money on its mobile devices, is looking to focus on just a few core products rather than spread itself too thin.
Coming to some of the available details regarding the incoming software, it is reportedly available to the E5303 and E5306 models of the Xperia C4, and the E5333 and E5343 models of the Xperia C4 Dual. While the update for the single SIM models comes with firmware version 27.3.A.0.122, the software for the Xperia C4 Dual sports the firmware number 27.3.B.0.122. Although there's no word on when the E5353 and E5363 models will receive the update, seeing as the new software is already rolling out for some of the variants, it shouldn't take Sony too long to roll it out to the other two versions as well. The update is most likely being rolled out in phases, so in case you own an Xperia C4 and not yet gotten the update notification, you can always check for it manually by going into Settings app of your phone and tapping on the relevant menus.
Android updates, or the lack thereof, continue to remain a sore point for many users around the world. It isn't uncommon to see perfectly decent, capable devices missing out on new features, bug fixes and even security patches because the vendors just can't bother to spend their time, money and energy on maintaining and supporting a device that's no longer in the market and will no longer make them any money. While planned obsolescence may make good business sense in the short term, smartphone users from all around the world have often joined in their collective admonition of the companies who sell many of their mid-range devices on an as-is-where-is basis, at least as far as software updates are concerned.