Updated again to custom ROM. Stable since it's near stock with minor customization.
LRK modem known as good battery saver combined with Speedmod k13-3 kernel
How to do it?
If you are coming from Samsung Stock. You need to be rooted + busybox + CWM first.
1. Root your stock ROM. Reboot Recovery and load files below (Volume UP+ Home+ Power)
a. "Root_SuperSU.0.95.Only-signed.zip" then Reboot.
b. Then load "Root_Busybox_1.20.2_Only_(No_SuperSU)-S2-Update3-signed.zip"
2. You need to have Mobile Odin to load Kernel
a. Download Mobile Odin Lite v1.0 | Mobile Odin Lite v1.25. Mobile Odin Pro would be good.
3. Download Kernel. My suggestion SpeedMod. CWM included.
Odin version: SpeedMod K3-13 for Odin
Load kernel using your Mobile Odin
4. You are ready to load custom kernel now.
a. You are rooted
b. You have CWM + Safe Kernel
c. Download Classic ROM CWM FLASHABLE ROM here.
d. Copy file to your phone and Install ZIP file
-Factory reset (wipe date, cache and dalvik would be good. Clean)
-Storage> Format. Much2 better. Extra clean
Continue reading related to Classic V6 and SpeedMod