ecoNetBattery turn off the mobile data connection in screen off.
and, restore the mobile data connection in screen on.
Mobiledata OFF function is for all android version(2.1 & 2.2 & 2.3)
APN OFF function is not for CDMA devices.
The Pro version has a function to automatically start ecoNetBattery at the time of the start of the terminal.
Please try a free version before purchasing a pro version.