If you use normal N7100 cf-root to root N7102. You will have rebooting issue. And once you enter CWM recovery mode. You will see this happen again.
Press the "Vol Up + Power + Home key", when you see the Samsung logo, release the Power button first. then wait a few seconds. You should get into CWM recovery mode successfully.
Good luck.
Thanks bro. Will give it a try. So far quite happy with the phone now. Especially when it can finally connect to Google.
cheers