After installing this firmware all you can see is just kitkat theme every where like a kitkat 4.4 ROM but after updating all google apps and reboot you will see the changes clearly. Some apps doesn't work under old kitkat for now.

1-download 'Android 5.0 Lollipop' for any SM-T231/T230/NU model
2-put it into your sdcard or device
3-wipe cache/dalvik, if stuck at boot after installing wipe cache/dalvik/system/data and reinstall zip file
4-reset factory
5-install zip file
6-reboot system

----------------------------------------------------After installation----------------------------------------------------

1-it will ask for software update
2-update Google Play Services from play store
3-update all installed google apps from play store
4-open xposed installer
5-active the 5 Xposed modules
6-install framework then reboot
7-install BusyBox to system/xbin
8-open xtheme engine
9-you will find system theme and Gem Flat theme
10-choose Gem Flat theme
11-reboot device

Files different to 'Android 5.0 Lollipop' need to be install with Odin.

Files legend
XAR ->( USA)___PDA/AP VERSION___CSC VERSION___date