An XDA user has churned out a basic, deknoxed and debloated ROM for the Samsung Galaxy Alpha. It is designed to give you smooth, stock feel for bloated Korean variants of the android phone. It will work on the G850S, G850K and G850L.
The ROM is designed to be flashed using CWM and it will change the system files. The developer suggests you to be on stock Android lollipop firmware for best results.
Features of the ROM:
Based on G850FXXU2CPB2
Rooted (SuperSU 2.65)
Stable & Fast
No Korean bloatware
No SMS Limits
Network Mode Menu
SM-G850L (LG U+)
* Download and copy the ROM to device storage
* Flash TWRP recovery via Odin – Download
* Reboot into recovery mode
* Wipe System/Data/Cache & Dalvik Cache
* Install ROM