Keep Alive or Shut Down GPRS

T-Mobile in the US apparently disconnects your GPRS connection after one hour. My old PDA2K would disconnect fine but the K-Jam pretends to stay connected but really isn't. Sort of when your old modem was "connected" yet you weren't really on the internet. This means when you try to go online, or a scheduled sync starts, you are getting nothing. For now I am going to set one of my POP3 accounts to sync every 30 minutes and see if that works. Another alternative would be an app that monitors activity on the device and after so many minutes, force GPRS to disconnect.