From WebOS Internals
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Enabling Developer Mode
- Go to the main (start) screen on your Palm Pre or Pixi
- Start typing "webos20090606" without the quotation marks.
- Tap the Developer Mode icon and turn Developer Mode on.
- Set Developer Mode to ON.
- When asked, tap Reset The Device. Your phone will restart.
- Connect the USB cable to your computer and select "Just Charge" when the phone prompts you.
Type what's below in universal search to find the Developer Mode Enabler app. Run it. This is the classic Konami Code
Since webOS 1.1 a shorter version also works:
Set the Developer Mode toggle switch to the on position.