Make sure you close samsung kies when you try to use odin.
As for flashing anything from odin, you will need to boot into download mode (vol. Down + power + home) after switching phone off. Then press vol. up, you will see a warning, first and after that comes the downloading screen.
Now make sure drivers are installed correctly, open odin, and now connect phone with usb cable, wait for some time till it shows a yellow box saying COM : ID xxx , something like that and now you can flash relevent files through relevent options. Wait for pass (green) signal and you're done.
That seems crazy, if it shows flight mode, you should also not be able to recieve calls. Seems a problem with the rom. Try wiping cache/dalvick cache /data from cwm/twrp and see if it fixes the bug. If not contact the rom developer or flash another/stock rom and reflash CM 10.1 to see if the problem persists.
A Hero Can Be Anyone. GENERAL HELP THREAD
so i will have to wait hehe