I'm finally doing this to my Captivate and I'm not sure what I'm doing wrong.
I have the zip file in the right spot. When I reboot the phone while holding down the volume buttons it goes to the right screen, but the only options I can choose are
reboot system now
apply update from sdcard
wipe data/factory reset
wipe cache partition
If I choose reboot system, the phone just restarts normally. If I choose apply update from sdcard it gives a list of folders, but none are the update file. And I don't want to even mess with the last 2 options.
Help and thank you!