I’m not responsible if something went wrong on your phone(Usually nothing goes wrong), you’re doing this on your own responsibility.
Rooting will void your warranty so, don’t root unless you know what you are doing.
All credits go for Chainfire for making the CF-autoroot.
1-Download these files:
1-CF-Autoroot Depending on your model number which could be found in Setting-> About Phone:
A) For N7100 Model go HERE.
B) For N7105 Model go HERE.
C) SHV-E250K Model go HERE.
D) SHV-E250L Model go HERE.
E) SHV-E250S Model go HERE.
F) SPH-L900 Model go HERE
G) SGH-I317 Model go HERE
H) SGH-I317M Model go HERE
I) SGH-T889 (T-Mobile version) Model go HERE
IF you didn’t see your model number above don’t try this method because it might brick your phone.
Step1:Extract the CF-Autoroot until you got a file with .tar.md5
Step2: Extract odin307.zip then run Odin3 v3.07 as administrator.
Step3:Shutdown your Note 2 completely. Then, hold down the volume down button+ the home button then press the power button for 5 seconds, after you will see a warning screen just press volume up.
Step4: Now click on “PDA” and choose the .tar.md5 file we downloaded earlier. Then connect the USB cable to your computer then to your Galaxy Note 2. Now Click on “Start”.
Step5: Once it successfully finishes you will see “Pass” in the above table of the “ID:COM”