• Bypassing Manufacturer Lock

Hi folks, I've been testing out a phone that runs AOSP called the Snapfon ez4G and I'm running into issues installing/side-loading APKs on the device. I have developer mode enabled, have installing unknown sources turned on, and disabled verification via USB but I still can't install any apps (including the ones on apps4flip). I always get a INSTALL_FAILED_VERIFICATION_FAILURE error when I try to do it via adb.

Does anyone know of any other methods that I can use to try to get past this?

Can you try pulling an apk from the system partition and posting it here? That could give us some clues as to what the system is trying to verify.

Run adb shell pm list packages

Then run adb shell pm path <insert package name here>

Then run adb pull <path from previous command>

Looking forward to examining it

    Use google drive or file.io or wetransfer and then post the link here

      Would you be able to pull the framework jar files from /system/framework/*.jar and post them here. We need to take a look at the package manager code and see why it is throwing that error?

      Also does the phone come with any 3rd party apps like facebook etc pre-installed? If it does, can you pull them and post those here?

        Apps4Flip-Admin there is a FB app: [Login to see the link] and the T9 program is 3rd party by the looks. Do you want all the files from /system/framework/ or just the framework ones?

        EDIT: s/package manager stuff/framework ones

          We would want all of the .jar files

          Here is the same apk modified to fool the phone that it is facebook to try - [Login to see the link]

          Let us know if this one works

            Gotcha, looking forward to seeing what those jars contain

              So an update. I have extracted the package manager code from the vdex file and am looking through it. Will let you know if I find anything.

              Not looking good, the restriction was implemented on the native side of the package manager in C++. We are going to have to dig deeper.