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Thread: Completely disable cellular radio

  1. Droid Ninja
    metalspring's Avatar
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    #11
    Quote Originally Posted by gimpyestrada View Post
    After going back to stock I used adb to remove Phone.apk and it _looks_ like my cellular radio is disabled. Not 100% sure how to verify that it is, though.
    If you're still rooted then try this in terminal emulator as su(or adb works too)
    logcat -b radio

    Or you might wanna try this to make it easier to read
    logcat -b radio > /mnt/sdcard/radiostate.txt

    Supercharged tweaked Miui.us
    Primes deprimed kernel @ 1.2GHz w/ customized kickasskernel tweaks and 3g turbocharger
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    My cMetal 11.0 rom for the verizon galaxy nexus

    Phone- The GALAXY NEXUS LTE a​ll the
    Rom- My own cMetal 11.0 rom (linaro enhanced cm-11.0)
    Kernel- ASKP or my modified mpokang v10 superram kernel
    previous phone the trusty ol' droid 1
  2. Senior Droid
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    #12
    Quote Originally Posted by metalspring View Post
    If you're still rooted then try this in terminal emulator as su(or adb works too)
    logcat -b radio

    Or you might wanna try this to make it easier to read
    logcat -b radio > /mnt/sdcard/radiostate.txt
    Ok, that's a lot of stuff that I don't know what it means. What am I looking for?

    radiostate.txt
  3. Droid Ninja
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    #13
    Looks like the radio is still on...(ril and rild are the main parts of the radio and they are working unless they are throwing out obvious errors which they aren't there)

    Ideally you could flash a "blank" baseband but 1, I have no idea what the ill consequences might be and 2, I don't know of any update.zip with a "blank" baseband

    However, your main concern is saving battery, right? Well just leave it as-is for awhile then look at the battery stats to see if the cell radio is really using much (if any) battery...I'd suggest the spare parts app or spare parts+ (for gingerbread roms)

    Supercharged tweaked Miui.us
    Primes deprimed kernel @ 1.2GHz w/ customized kickasskernel tweaks and 3g turbocharger
    19.9 linpack score
    1921 quadrant score
    Zoom zoom
    My cMetal 11.0 rom for the verizon galaxy nexus

    Phone- The GALAXY NEXUS LTE a​ll the
    Rom- My own cMetal 11.0 rom (linaro enhanced cm-11.0)
    Kernel- ASKP or my modified mpokang v10 superram kernel
    previous phone the trusty ol' droid 1
  4. Senior Droid
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    #14
    Quote Originally Posted by metalspring View Post
    However, your main concern is saving battery, right? Well just leave it as-is for awhile then look at the battery stats to see if the cell radio is really using much (if any) battery...I'd suggest the spare parts app or spare parts+ (for gingerbread roms)
    Good idea, I know that putting it into airplane mode and then turning on wifi keeps a charge for a very long time, so if the radio is really not doing anything it should provide similar results. I'll charge it up and report back when it has drained.
  5. Senior Droid
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    #15
    I am happy to report that after restoring to stock Cyanogenmod 7.1, then removing the Phone.apk, then resetting the battery stats, I have gone through three charge/discharge cycles and I am happy to report that the only things listed in my battery stats are:
    Android OS: 30%
    Wi-Fi: 30%
    Phone idle: 29%
    Display: 12%

    The cellular radio is not listed anymore so it would seem as though I have successfully disabled it.

    This old battery is giving me 17h48m and its at 10% remaining!

    Thanks for everyones suggestions.
    eternallearner likes this.
  6. Master Droid
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    #16
    that 30% Android OS usage seems a little high. Probably depends on what kernel and setup your using I suppose. I know when I updated my ROM and I got lazy and didn't want to backup/restore apps, I just wiped cache and dalvikcache and left /data and /system intact, my OS usage was at like 68% for a little while then after flashing a new kernel and applying a couple build.prop mods, after about a week it settled back into like the 3%-5% range. Which is why I'm wondering how yours is still so high. I think instead of trying to find a blank baseband or something you should just try erasing some phone related .apks in /system then there's no possible way to use the phone function. But yea you still don't want it searching for a cell signal then, some way to put it into airplane mode and then erase the phone and radio related system files.
  7. Senior Droid
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    #17
    Quote Originally Posted by meishkov View Post
    that 30% Android OS usage seems a little high. Probably depends on what kernel and setup your using I suppose. I know when I updated my ROM and I got lazy and didn't want to backup/restore apps, I just wiped cache and dalvikcache and left /data and /system intact, my OS usage was at like 68% for a little while then after flashing a new kernel and applying a couple build.prop mods, after about a week it settled back into like the 3%-5% range. Which is why I'm wondering how yours is still so high. I think instead of trying to find a blank baseband or something you should just try erasing some phone related .apks in /system then there's no possible way to use the phone function. But yea you still don't want it searching for a cell signal then, some way to put it into airplane mode and then erase the phone and radio related system files.
    I wiped everything before installing CM7.1. This was a clean install with the default kernel.
  8. Droid Newbie
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    #18
    Quote Originally Posted by gimpyestrada View Post
    Is that permanent or does it come back on a reboot?
    This works PERFECT and is easily reset to turn radio back on in a few seconds.

    Phone test code: *#*#4636#*#*

    Just dial > Phone Information > (Scroll Down) Turn off radio

    It takes about 5 seconds to turn on and off.
    Keeps your wifi on and saves battery.

    Thanks to the original original poster!
    eternallearner likes this.
  9. Junior Droid
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    #19
    Thanks to the OPs for this thread.

    Just be warned. Disabling the phone will keep it from dialing 911. I have not tried it on a non activated phone, but I am told any phone with signal can dial 911.

    Matt|ttaM
  10. Master Droid
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    #20
    To access the permanent features, you dial ##7764726(program) then tap DIAL, this leads you to the SPC menu, type six zeroes and then verify.
    You now see a list of options to select, pick User Activation, and DELETE the MIN, MDN and CDMA system ID, tap DONE.
    Then select Extended NAM.
    Delete the MIN here, and the MDN, as well as the CDMA system ID, Country Code, CDMA network, 1st Channel A, 2nd Channel A, then 2nd Channel B, ALL the emergency numbers, and for the final act, change the SPC to a known number, anything but what it shows., once finished, tap DONE, the phone will reboot, and your radio will now be deactivated and IMPOSSIBLE to access any cell tower!
    Last edited by AECRADIO; 11-25-2013 at 12:25 AM.
    Ernest A. Erickson
    Payson, AZ.
    NCC-1701E
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