model no- gt-n7100
android v- 4.1.9
kernelv- 3.0.31 -215196 se.infra@SEI-46#1 etc...
i want to root the device
the problem is it wont go to download mode
first i try with to go download mode by using vol down + home + power but it wont go to down load mode i didnt release the button until the logo samsung appear and keep holding yet it is go directly to home as nothing happen. when i try to go to recovery it is success (volup+home+power). then i try remove battery for certain amount of time and retry the first method but still nothing happen. then i try to remove the battery open odin, connecttheusb, holdvoldownandvolup, connecttheusbtothephone, yet nothing happen. then i decided to root by using one step root which kingo root and it success and it is superuser in it. then i download ezbootfreeapp, quickrebootapp andswiftrebootapp and try to go download mode but its not working. my question is there any problem with the device that it wont go to download mode or it is the defect on system? how to overcome this situation? i want to upgrade to v4.2+ but with this situation it wont go anywhere. i need a solutionon this.thank you