Similar to every enV Touch owner ever, I've had the reboot issues, signal issues, etc. Now (as of this morning), I can't use it for more than 20 seconds before it freezes, and I need to take out the battery and reboot to make it work. I found if I put it in airplane mode, it works fine, though it kind of takes away the main function of the phone. I already had to replace it once, and not looking forward to doing it again. Help?