Hi, i was new to Android platform. I was following this thread to root my galaxy s2. [GUIDE] And then there was ROOT ! - xda-developers However there is a step i can't get it right. Under "Long guide (for beginners)", the guide told me to start Odin, but i do not know how to start the Odin. The screen seem to hang whenever i pressed volume up to enter to the odin starting screen. I appreciate your help. Thank you..
from what i understand, you have to download odin on your pc. so, with the phone disconnected from the pc, you do the three button combination. then on the pc you start the odin application. then you connect your phone back to the pc using a usb cable. at this point odin should alert you that a device has been attached.
Yeah entering download mode on your phone is a case of turning off your phone and switching it on by holding the volme down switch along with the home button and power button untill you get the green android screen and asks you if you want to continue or not. Then after accepting to continue you'd boot up Odin on your PC and plug in your phone via USB. I don't know if you had just got your wires crossed.
By the way I'd ignore that thread yo linked and go to http://forum.xda-developers.com/showthread.php?t=1103399 as it does say it has been superceded by the latter. Please read it many times to ensure you get it right.