This tip applies to all Mac users using any EVDO card (Sprint or Verizon). The default setting in your Mac is to disconnect after 10 minutes of inactivity. This tip will show you how to disable this.
Open System Preferences
click Show Network Status
click your EVDO Card in the list e.g. Airprime CDMA... or Novatel or Qualcomm
click the Configure Button
click the PPP Options button
UNCHECK the disconnect if idle for 10 minutes cehckbox
click Apply Now
Also try with it checked to prompt every 30 mins to maintain connection.
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