Samsung Galaxy S3: How to Boot into Download Mode

When you are in download mode on your Samsung Galaxy SIII, then you will be able to download and flash ROMs and kernels on it, and you will also be able to install CWM Recovery while you in this mode.

See also: How to Install ClockWorkMod Recovery on Samsung Galaxy S3

But, in addition to the advantages mentioned above, it also carries considerable risk to you. If it is configured poorly it is