My Treo is connecting a data call (amber light, green arrows) more than once every minute. Because it's hogging the connection, it prevents me from receiving voice calls and it discharges the battery in half a day.

It started two weeks ago when I installed the latest firmware update from the Palm website. After that, the behavior has been pretty consistent.

I tried disabling or deleting programs that I thought might be causing it to connect, but I couldn't identify a culprit. Finally, yesterday, I did a hard reset and left it completely "blank" - I didn't install anything or even setup wirelesssync. If I leave the network connection completely off, it doesn't connect, but once I connect the first time, it continues to connect every 30 sec or so.

This has hobbled my phone. Does anybody have any suggestions how to fix it?