What is the Operating System in your mobile phone?

My mobile phone is set into Android 4.4 version Kit Kat for the operating system.
I think it is quite good and suitable for me.It is easy to use.
Moreover, there are a lot of applications on play store that I like to download to keep them on my mobile phone. Android is quite not expensive and it works well.
I like this operating system and I choose it for my mobile phone.


Jamrut 009 4EN