DCSwitch

A better way to turn your mobile data channel on/off than mangling APN entries.

Data channel toggle app+widget to save battery power and bytes on a limited data plan.

Similar apps mangle the APN list of your phone, potentially corrupting it.

DCSwitch uses android's undocumented services to enable/disable the data connection in a clean, mean and concise manner.

NOTE1: HTC SENSE not supported.

NOTE2: Does not work on Gingerbread. See and star this issue to make it work again: http://code.google.com/p/android/issues/detail?id=15031