Wednesday, December 26, 2018

samsung galaxy s 3 - Can I enable USB debugging using adb?


I own a Samsung Galaxy S3 and the display is broken and USB debugging is set to off too.


How can I enable it using ./adb commands? I have done these steps already:



  • data/data/com.android.providers.settings/databases/settings.db changed adb_enabled value from 0 to 1.

  • Also edited build.prop in /system.


After doing all this, the phone seems bricked, it's not turning on. All I want to do is enable USB debugging and connect it to Vysor(beta) so I could control it on my computer.



Answer




I got it to work :)


NOTE: This requires unlocked bootloader.



  • Connect the device to Mac or PC in recovery mode. (I had to map the process in my mind as the screen was broken).

  • Now open terminal/CMD in computer and go to platform-tools/. type and enter ./adb devices to check if the device is connected in recovery mode.

  • Now type ./adb shell mount data and ./adb shell mount system to mount the respective directories.

  • Get the persist.sys.usb.config file in your system using ./adb pull /data/property/persist.sys.usb.config /Your directory

  • Now open that file in a texteditor and edit it to mtp,adb and save.

  • Now push the file back in the device; ./adb push /your-directory/persist.sys.usb.config /data/property

  • Get the build.prop file; ./adb pull /system/build.prop /your-directory



  • Add these lines:


    persist.service.adb.enable=1                                                    
    persist.service.debuggable=1
    persist.sys.usb.config=mtp,adb

  • Push build.prop back into the device; ./adb push /your-dir/build.prop /system/


This way you enabled USB debugging on your device. But you still can't connect. Why? Because it asks for RSA verification. If you could view your display then you could easily tap on YES to authorize the device. I am currently figuring out to bypass this. I want to revive my dead phone badly. If you know any way to do this, please share :)


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