My girlfriend has an android phone, the Lenovo S720.
She wants to upgrade it to avoid hangs and crashes (a friend of mine told me that the Kitkat is much more stable than the previous android OS's) but I don't know how. Is it even possible to upgrade it to Kitkat? If not, what's the latest version that I can install to her phone?
A detailed step by step process would be very much appreciated.
I'm actually a WP user so I'm not too good with working around Android devices.