Line is one of the most popular messaging Apps, especially in Asia.
On March 3 I downgraded the app LINE to an earlier version and extract the database successfully. Later this apk downgrade method feature became available in UFED as shown in UFED 5.0 release notes.
Now the latest version of LINE is 6.6.1 and I want to use the same apk downgrade method to backup the database of LINE. Guess what? I could not install older version LINE apk. You guys could take a look at my blog to see what's going on
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It seems that Naver LINE offers a countermeasure to deactivate Apk Downgrade Method. What a pity Apk Downgrade Method is not working on LINE anymore. We have to find another way to extract LINE chat messages.
Looking at your blog site it appears that the error is with pm (Package Manager) not liking the -d option being passed to it rather than the Line App preventing an older version being installed…
As AmNe5iA said, seemingly that tool does not like one of the two -d options in the command line.
Error Unknown option -d
Maybe you changed adb version and the syntax for the command has changed? ?
Or maybe the parser has changed, at first sight the issue is caused by the second -d.
What happens withadb -d install -r LINE_OLD.apk? ?
jaclaz
Thank you guys. I've done some test with different parameter or newer version adb but in vain. It's ok. At least I could root the phone and extract the database file of LINE.
Thank you guys. I've done some test with different parameter or newer version adb but in vain. It's ok. At least I could root the phone and extract the database file of LINE.
So we will never know if the procedure works or not (or what errors actually correct command parameters create).
The statement
It seems that Naver LINE offers a countermeasure to deactivate Apk Downgrade Method.
Should be changed to something like
It seems like I cannot find the correct command line or adb version to make the APK downgrade, I tried a wrong set of parameters, and then a few more ones, but they didn't work.
jaclaz
Thank you guys. I've made a mistake, and the parameter should be "-d -r " for installing old version apk. Fortunately we could still extract the latest version LINE 6.7.1 chat messages.