My Dell Axim PDA is dying. No more pure PDAs available. Planning to use unlocked Google Galaxy Nexus as PDA with phone circuits turned off to extend battery life. Questions: 1) Will the phone transceiver stay turned off when the device is on, simply by not having a SIM card inserted? 2) If not, are there menu settings I can use to keep the phone transceiver turned off as the default condition? 3) If not, is there an app I can install that will force the phone transceiver off? 4) If not, is there any other way to force the phone off when the device is on? 5) Any other tips, hints, warnings or better ideas? All responses greatly appreciated.