Sony has been rather slow in updating its devices with the latest firmware of Android. Even if the company is planning to deliver the Android 4.4 or at least Android 4.3 to some of its smartphones dating back as far as 2012, the other devices are not that lucky. The firmware is not compatible with their build and officially, they will never have access to Android 4.4. However, thanks to custom Android ROMs, the Sony Xperia Go, Xperia P, Xperia Sola, and Xperia U have now the possibility to upgrade to the latest Android version with the help of CyanogenMod 11.
It is worth mentioning that this is an unofficial build for the moment, but if you want to try out the latest features of Android 4.4, you are free to try up the custom ROM for your Sony device. As some of you might know, CM 11 is still under development, and the Cyanogen Team has not offered any other detail so far.
In the same time, what users have to know is the fact that CyanogenMod is based on vanilla Android. When using the custom ROM to upgrade to Android 4.4 KitKat, users will not receive the features created by Sony or the Sony’s custom UI. In the same time, as it is normal to any unofficial build, they are very unstable, and their purpose is to test consumers in order to improve the software until the final version is released.
The CM 11 build is also available for Sony Xperia Z1 and Xperia Z Ultra, but in the same time, these two smartphones will receive the official Android KitKat update pretty soon.
The already mentioned devices were considered a high-end device back in 2011 or 2012. Now, they are only at the low end of the spectrum. In this respect, they are left aside when considering a software update as happened in the case of Android KitKat. The Xperia U and Xperia P were released in early 2012, having a 1 GHz dual core processor and only 512 MP of RAM. In the case of Xperia Sola, the device was released a month latest, and it might be placed between the previous two devices. Regarding its hardware part, it is still a low-end device, with the only mention that Xperia Sola, with the NFC support, was quite a hit at the time.
If you want to learn more regarding the Android 4.4 KitKat, you can check out its features and options before you decide to upgrade to the latest Android firmware using a Custom ROM.