Treo 300...After installing an application that turned out to me less than desirable the system locked up several time and required a reseting. So I deleted the app and now several functions have changed. No longer get the splash screen while connecting and disconnecting with Sprint services. No longer asks if I want to dial a number when selected from the phonebook directory. And now if I have to reset (soft I think, by pushing button in hole on back) it locks into a loop with a fatal exception error. The only way out is to hold down the scroll up button on the front and push reset again (hard reset, i think).

Is there a fix? Can I some how start over to reinstall everything and get back to normal?

Thanks for your help

Here's the instructions for performing a hard reset on a Treo 270; I assume it is the same for a Treo 300:

http://www.pdaphonehome.com/forums/showthread.php?s=&threadid=41193

Note that it is apparently the power button (not the scroll button) that needs to be held down while you push the paperclip through the reset hole. Then, when it displays a warning about erasing everything, you press the scroll-up button to complete the hard reset.

If that doesn't work, there's one more thing you could try, but I don't know whether it really does any more thorough of a reset than the regular hard reset. If you have a tiny screwdriver, you can remove the four tiny screws from the back, pry the back off (run your fingernail through the groove), and open it up. Then you can disconnect the battery, wait a few minutes, then reconnect the battery. That's the most extreme form of reset that I can think of.

I recently replaced the battery in my Treo 300 ($14 on eBay), and that definitely does accomplish a hard reset.

-Dave
dave314 at burtonsys.com