Updating firmware on samsung galaxy s
Samsung maintains an official webpage where you can grab the drivers you need.
Let us know in the comments if you have used Odin successfully yourself, or if you have any additional questions on the process!
To find the exact key combination for your device, just do a simple Google search — for instance "Galaxy S3 download mode." At this point you can connect the phone to your PC using the USB data cable.
Newer Galaxy phones without a home button will require a different button combo to enter Download Mode (Volume Down Bixby Power).
With the device turned off, press Power Volume Down Home to enter Download Mode.
Some older devices use a different button combination.