View source for GSM oscillating between registered and not registered

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Return to GSM oscillating between registered and not registered.

Retrieved from "http://openmoko.org/wiki/GSM_oscillating_between_registered_and_not_registered"

GSM switches between registered and not registered in deep sleep mode. The distributions have a fix for it so that the modem does not enter deep sleep mode but with that you cannot reach maximum runtime.

A hardware fix for the deep sleep problem is described here. [1]

With that fix, you can enter deep sleep mode without the reregistering problem.