I have an old Motorola Droid that is no longer subscribed on any Verizon service. I still use it for things like web browsing, ebooks, and along with some wireless stereo headphones, music. I've already turned off 3G data usage (EVDO) by disabling the
Enable data option under
Mobile network settings. However, when I turn off the cell radio (CDMA), bluetooth is also disabled. I first observed this problem on the stock Android 2.2 firmware. Now my phone is rooted, running on an Android 2.2 based firmware (CyanogenMod 6).
Why disable the cellular radio?
Simply put, I want to turn it off because I don't use it. Moreover, it uses battery life and cpu time (even if relatively small amounts):
I've tried two different methods of disabling the cellular radio, but both ended up doing the same thing:
- Turning on
Airplane mode, then re-enabling Wi-Fi. This has the expected consequence of also disabling bluetooth.
- Using the Phone Info menu by dialing
*#*#INFO#*#*(4636) and pressing
Turn off radio. This actually just turns on
As you can see, even though Wi-Fi does stay on,
Airplane mode disables bluetooth. The headphones won't sync until I turn off
Airplane mode, which of course turns the cell radio back on.
In both cases
Airplane mode is enabled, so bluetooth gets disabled. But now that the device is rooted, I should be able to disable the cellular radio without using
Airplane mode at all. How can I do that?