A mobile electronic device with fragmented device settings enables preservation of user-defined settings during over-air software updates. Such a device in one aspect comprises a memory adapted to store at least one device setting including a default setting determined independent of any user of the device and a user setting determinable by a user of the device; a wireless interface adapted to receive a software update; and a processor communicatively coupled to the wireless interface and the memory and adapted to update the default-setting in response to the software update.