Samsung Galaxy S/SGH-T959V/How to get into download mode
- Take your microUSB cable and plug it into the computer, but not the phone (yet)
- Take out the battery from the phone
- Put the battery back into the phone
- Hold vol + and -, keep holding them
- Plug the USB cable into the phone.
- You should now be in download mode and should see a picture of a yellow triangle with Andy and a shovel in the middle.
- You can now flash your Odin/Heimdall file.