Samsung VibrantA lot of users are having trouble accessing the download and recovery modes in Samsung Vibrant since the hardware access seems to have been disabled in the newer phones. The guys over at XDA are working on a fix for this, but for the meanwhile, here are some methods that you can try to get into recovery mode:

METHOD 1: ACCESSING DOWNLOADER/RECOVERY:
(if the following directions do not work… then your phone may be locked out from using hardware buttons to access downloader/recovery)
Download Mode:
With the phone powered off
Plug in the USB cable.
Turn the phone on it’s side and use both thumbs to hold (left thumb) Vol Up and (right thumb) Vol Down
Press and hold the power button with your right index finger til you see "Virbant" release the power button and it should say Downloading.
Recovery Mode:
With the phone powered off
UnPlug the USB cable.
Turn the phone on it’s side and use both thumbs to hold (left thumb) Vol Up and (right thumb) Vol Down
Press and hold the power button with your right index finger til you see "Virbant" release the power button and it should be on the recovery screen.
METHOD 2: STUCK AT VIBRANT SCREEN:
(and are not able to use vol+ vol- methods to access downloader/recovery)
You will need the samsung ADB drivers installed for your phone as well as ADB…
ACCESS DOWNLOAD MODE
1) remove back cover and take our sim card and sd-card.
2) take out the battery
3) hold ALL 3 buttons down at the same time. (Vol +, Vol -, Power)
4) while holding down those 3 buttons put the battery back in
5) continue holding all 3 buttons until the vibrant disappears and reappears… once it reappears, release all 3 buttons
6) Setup ODIN and get it all setup and ready… (if you are flashing your phone via odin)
6) now connect your phone to your pc via USB cable
7) open a cmd prompt and navigate to the folder with ADB and type ADB REBOOT DOWNLOAD
8) Your phone will reboot into the download screen… go back to ODIN – A com port should now appear for your phone…
9) Click start and wait for your phone to do its thing
ACCESS STOCK RECOVERY
1) remove back cover and take our sim card and sd-card.
2) take out the battery
3) hold ALL 3 buttons down at the same time. (Vol +, Vol -, Power)
4) while holding down those 3 buttons put the battery back in
5) continue holding all 3 buttons until the vibrant disappears and reappears… once it reappears, release all 3 buttons
6) now connect your phone to your pc via USB cable
7) open a cmd prompt and navigate to the folder with ADB and type ADB REBOOT RECOVERY
8) Your phone will reboot into the stock recovery and flash whatever update.zip you need
METHOD 3: STUCK AT PHONE ! COMPUTER:
Plug in the USB cable.
Turn the phone on it’s side and use both thumbs to hold Vol Up and Vol Down
Press and hold the power button with your right index finger.
The screen will go black, continue holding.
The screen will come back on, you’ll see the same Phone to Computer icon
Continue holding, the screen will go black
The screen will come back on, you should see "Vibrant" release the power button and you it should go into Downloading

Let us know if any of these work for you. Else wait for the fix to be released. If you get recovery mode working, follow our video guide here on how to root your Vibrant phone.