The Lenovo Security Center issue is just a coincidence. I am having this on my XiaoXin Pad Pro 12.6 on Zui 13. The app needs an update I think.Hello everyone,
I want to make sure that is it possible to downgrade to ZUI 12.6.x with bootloader locked after upgrading to ZUI 13.0.x? Let me share my experience regarding this topic.
Early in this month, I bought TB-J716F Chinese rom version and enjoyed using it normally (I mean, with bootloader locked) for a while. At that time, rom version of my device was "12.6.238" (I received an OTA update "12.6.211 to 12.6.238" in the first day of use.)
And last weekend, I found this post so I decided to update rom version to "13.0.364" by using zip files in this post. Everything worked perfectly. Then, I unlocked bootloader and relocked again because it's my first Android device of Lenovo so I just wanted to make sure how to do it. Both processes worked perfectly.
After that, I wanted to know how to use QFIL also, so I tried flashing "12.6.211" rom with QFIL. After flashing it, my device stucked with the error:
"<!> Your device is corrupt. It can't be trusted and will not boot Visit this link on another device: g.co/ABH"...
I thought I had bricked my device completely... But I managed to find that I can still unlock bootloader again. After unlocking, I tried the followings:
1. Flash "12.6.211" rom with QFIL (This time, with bootloader unlocked.)
--> Can boot and use device normally, but the device must remain unlocked. If I relock it, it goes bricked again. It means that I cannot get OTA update to "12.6.238".
2. Flash "12.6.211" rom with QFIL + Apply "12.6.238 to 13.0.346" update zip manually
--> Can boot and use device normally, and can still boot device after locking bootloader. But you know, all the user data will be wiped immediately after locking bootloader. After being wiped, I cannnot launch the built-in "Security" app anymore.
(After flashing with QFIL, I assume that I should apply "12.6.211 to 12.6.238" update first, but unfortunately I don't have the zip file for doing it manually so far. And I cannot get OTA update to "12.6.238" either because if I lock bootloader on "12.6.x" version, it goes bricked. This could be the cause of my "Security" app problem...)
3. Flash 12.6.211 rom with QFIL + Apply "12.6.238 to 13.0.346" and "13.0.346 to 13.0.364" update zips manually
--> Result is identical to 2.
So far, it seems that now I can lock bootloader with ZUI 13.0.x roms only. Is there anyone who has similar experiences?
I appreciate any comments regarding this problem.
Oh, do you have the Security Center issue on ZUI 13, too? In my case, I can launch the app on ZUI 13 if I stay with bootloader unlocked after upgrading from ZUI 12.6 because the update itself doesn't wipe data. How about you?The Lenovo Security Center issue is just a coincidence. I am having this on my XiaoXin Pad Pro 12.6 on Zui 13. The app needs an update I think.
On a side note, do you think the boot loader needs to be unlocked to flash via QFIL? Does you get Widevine L1 back once it is locked?
My 12.6 was fresh out the box with an OTA waiting for me. I've done a factory reset and the security center is still taking control over my apps!! I've not touched the boot loader.Thank you very much for your comment!
Oh, do you have the Security Center issue on ZUI 13, too? In my case, I can launch the app on ZUI 13 if I stay with bootloader unlocked after upgrading from ZUI 12.6 because the update itself doesn't wipe data. How about you?
I've got Widevine L1 back after relocking bootloader on ZUI 13. For me, the only issue after locking bootloader is the Security Center app...
I don't know whether you can flash roms via QFIL with bootloader locked properly or not. Because I have only ZUI 12.6 rom that can flash via QFIL so far. (As I mentioned above, when I flashed it with bootloader locked, my device bricked. So my devices must be unlocked before flashing it. If I can get ZUI 13 rom file for QFIL, it may be possible, but it seem that there is no ZUI 13 rom file for TB-J716F yet.)
I'm sorry, now I am confused a little. Then, when did you experience the Security Center app issue on ZUI 13 and how did you fix that?
Have you found any workaround for the issue?
Nope just having to live with it for now. Strangely.. My security centre is working on ZUI 13 Xiaoxin Pad pro 11. Its only the 12.6 where I have the issue!!
Thank you for your reply.
I did not factory reset so you may well be right!!Thank you for your reply.
After upgrading your Xiaoxin Pad pro 11 to ZUI 13, did you execute "Factory data reset" on the device? If you didn't yet, I think it is normal behavior. Because after I upgraded my TB-J716F from ZUI 12.6 to ZUI 13, there was no issue. But after I relocked bootloader (it causes wiping data), the issue occurs.
So I suspect that If you execute "Factory data reset" on your Xiaoxin Pad pro 11, there will be high possibility that the device also has the issue. (Of course, I don't recommend to do that!)
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