Bypassing Manufacturer Lock

nuclearkev

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?

Apps4Flip-Admin

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

nuclearkev

Apps4Flip-Admin hmm, I don't see a way to upload a file here in the forum. Do you know of a way to do that?

nuclearkev

Apps4Flip-Admin I could upload the AndroidManifest.xml, if you want

Apps4Flip-Admin

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

nuclearkev

Apps4Flip-Admin
File Manager: [Login to see the link]
Contacts App: [Login to see the link]

Apps4Flip-Admin

We took a look, try this apk - [Login to see the link]

nuclearkev

Apps4Flip-Admin It failed with the same error as before.

Apps4Flip-Admin

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?

nuclearkev

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

Apps4Flip-Admin

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

nuclearkev

Apps4Flip-Admin That one fails with the same error as before. I'll work on getting those jars

Apps4Flip-Admin

Gotcha, looking forward to seeing what those jars contain

nuclearkev

Apps4Flip-Admin Not sure of your OS so I just compressed it with zip: [Login to see the link]

Apps4Flip-Admin

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.

Apps4Flip-Admin

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.

nuclearkev

Apps4Flip-Admin Honestly, I wouldn't worry about it too much. The phone is absolute trash. It really wouldn't even be worth getting others app on it!