Ascend Y300 can be called Huawei’s second most popular smartphone behind Ascend P6 and developer support behind Y300 is much more widespread than for the P6. So as a result of that we are seeing custom ROM’s coming up constantly for Ascend Y300 and the best example for that is a very stable port of CM11 being available for Y300 after few weeks of Android KitKat release by Google. http://huaweinews.com/2013/12/android-4-4-rom-ascend-y300/
SlimKat is the name for ‘SlimRom’s Android KitKat based custom ROM’s and if you don’t know what SlimRom is, its actually something like CyanogenMod but with many unique features built in to it. We wouldn’t go beyond explaining you all the features because slimrom’s official web site has good amount of documentation about it – http://slimroms.net/index.php/slim-bean-features
This SlimKat ROM is based on the CyanogenMod 11 for the Ascend Y300 and the development of SlimKat for Y300 started in January this year so the developer ‘chil360′ on Modaco forums has gone through multiple phases of development as of right now. Even though there are few quirks exists for some people as reported on the Modaco thread, we can call this ROM an stable one.
SlimKat is based on Android 4.4.2 of course and you need TWRP or CWM to flash this ROM on your Y300. If your Y300 is still running stock firmware and you don’t know how to do these stuff, we have covered all the details including bootloder unlocks,rooting and custom recoveries which you can find right here – http://huaweinews.com/?s=ascend+y300
This ROM development is happening over at Modaco forums and if you are a newbie, our advice is to read the whole forum thread because you can find answers to many of your questions and possible issues. We cant really write about shortcomings of this ROM because the development is happening constantly so even if you know what you are doing, its better to read at least the last pages of the below link.
Modaco link for the SlimKat Custom ROM including download links – http://goo.gl/rQB5Og