Ever since I bought my first Treo 600 I set out to find how to unlock it. Unforunetly, I never solved the problem for myself. A few fellas from Treocentral.com, however, did solve the problem.
Here are the instructions on how to fully unlock any Treo 600:
Unlocking is actually quite simple:
Part One:
1. Download and install Card Export. NOTE: The Card Export shareware install file is attached to this post.
2. Make sure you can see the Treo's SD card as a logical drive on the machine the Treo is connected to.
3. Dowload the flash, patched.zip,
here.
Part Two:
1. Unzip all the files and copy them to the /PALM/LAUNCHER folder on your SD card.
2. Hard reset the Treo.
3. Navigate to the card using the standard application launcher and run FirmwareUpdater.prc.
4. Click OK, click the Update Now button (I may have forgotten one or two OK clicks here so don't hesitate to correct me here).
5. Sit back and relax, it's going to take a good 10 minutes.
6. The phone will automatically hard reset at the end of the process.
That's all, really. Note that I think it does do the entire 2.09 firmware upgrade, so all this should even work when you're on an older firmware version. I recommend you do the regular upgrade first though.
Good luck!
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