DO YOU SICK OF PLACEBO OR SLOWDOWN TWEAKS?
Then this tweaks are just for you and especially for your i9100
You can use this tweaks on other devices too but I don't know if they speedup so I guarantie only for i9100
WARNING: This changes may lea...
What is "Yellow Tint Display Problem"?
It shows us leds are slowly burning inside and this problem is not sgs2 only. All samsung phones (maybe other brands too but I'm not sure) which have LED screen have this issue after some usage.
Annndd.. Cm12.1!!! This time for real :D
This method released in other forums far long ago but here I am :D
You need to flash twrp via fastboot. Here's a working twrp for 6.0.1 link
Then just flash supersu 2.62.3 via twrp link
Don't root if twrp asks you root again.