Posted by Jayce Ooi as Software
Samsung Galaxy S II Odin Download Mode is new to me. Basically, it is used to install firmware, kernel and root Samsung Galaxy S2. Samsung Galaxy S2 needs to be in Odin download mode on these operations.
Samsung Galaxy S II Odin Download Mode
How to load Samsung Galaxy S II Odin Download Mode?
Custom OS installation warning
Samsung did a great move by letting Samsung Galaxy S2 bootloader unlock. Therefore, lot of developers are developing custom ROM for Samsung Galaxy S2 now compare to HTC Sensation and HTC EVO 3D which have locked bootloader.