Question [TB-J606L] Downgrade from Android 11 - Lenovo P11

Hello. Yesterday i installed latest OTA Android version (TB-J606L_S320030_210923_ROW) and noticed that it is really slow and it has even more bloatware that i don't want. I don't need to root it (because of bloatware removal) as i also need to revert it to default state as it was before update.
1. It is possible to find which version i had before this upgrade?
2. How could i downgrade system to previous version (i think it was Android 10 but i'm not sure)
PS: I successfully downgraded/rooted some devices but as every brand has it's specific way to perform downgrade, i'm asking here. Any advice would help and i'm aware of dangers of downgrading/rooting devices (bricking). In any case, it would be awesome to also link unbricking guide for TB-J606L, just in case It's always better to have plan B.
Update: I found source of roms for my device but i can't recognize which versions are old Android 10 and which are the new Android 11.

Related

Can a root device be upgraded?

Hi all
A week ago a rooted my Samsung Galaxy S6 device following this post: http://forum.xda-developers.com/galaxy-s6/general/root-pingpongroot-s6-root-tool-t3103016
All was OK. At that point my device is using the Android Version: 5.0.2
The question I have is that now the version 5.1.1 (Lillipop) has been released, I would like to know if my rooted device can still be upgrading when the new version is released in my region (Mexico) by the phone provider. (Telcel). In case it cannot be updated automatically, I guess I will need to do it manually or unroot my device. In that scenario, Does someone know a good tutorial how to do that?
Regards!
@LesthadMK, sure you can update rooted devices. But it may not be possible via OTA update. You will have to download the full firmware and install it manually.
Because root makes changes to system partition, OTA fails when you have rooted. If you unroot and flash stock recovery and kernel back, then OTA may work. Otherwise, simply flash the full firmware, in .tar format using Odin software, and you're good.
It's good to have full firmware saved on PC anyway, as if in case you brick your device, you can fix it by installing your device's firmware manually.
If you need help with 5.1.1 firmware installation on your s6, let me know the build no. of your device.. I will guide you to page you need to look at.
Thanks for the help. I have download Odin in case I need to do it manually.
Also, mentioned that yesterday I read an article saying that using the Samsung software "Smart Switch" in an rooted device will upgrade the device to the newest version (which I don't know if it it's true or not) Any way this is the link I found:.... Well seems since I'm newby I cannot post some external links. So just google it as: How to Use Smart Switch to Update Your Galaxy S6—Even It's Rooted.
By other hand, this is the build number for my device: G920IDVU1AOE3, so if you can help me to know how to upgrade that version that would be very helpful
Regards!

Downgrade Android 9 to 8.1

Hello everyone,
It is possible to downgrade to Android 8.1 from Android 9 on Samsung A9 ?
I updated it to version 9 and it is very confusing to use as design changes are looking really bad.
If i restore original samsung 8.1 version what program do you recommend for full data backup so i don't loose any data/applications/pictures on my phone ?
Thanks.
Apps are linked to google account, they can be re-downloaded. As for data from the applications you'd afaik need elevated permissions to access that data or a custom recovery. Pictures you should be able to easily back them up to your PC. Generally you can always downgrade but you may be nagged about updating. Also if you had a custom recovery and restored data to an older version, it may or may not cause issues.
I can't give you full insight because the last device I've used relating to samsung was their note/note pro, and the s6. I just thought I'd toss what I do know here.

How to safely apply updates when rooted?

I managed to hard brick my G8+ when trying to install an update (details in this thread).
I've ordered a new phone, same model, and I want to avoid making another expensive mistake!
What's the best way to be able to install updates when the phone is rooted with magisk?
And do I need to set up magisk in any special way first?
I have available updates on the (stock) phone now, should I install them now or wait until after I have magisk set up?
I'm not super confident with this stuff so any tutorials/extra info you can link to would be really helpful. Thanks!
I've been reading a bunch of other threads on this forum and I saw a lolinet download for an Android 10, on the software channel my phone has: https://mirrors.lolinet.com/firmware/moto/doha/official/RETAPAC/
Can I / should I use this to update the phone to Android 10? I would love to have a reasonably up-to-date OS but not if it's super difficult/risky to do it...

Galaxy S4 (SGH-M919) How to upgrade from android 4.4.4 to android 6+ ?

Hello.
I have a Galaxy S4 (SGH-M919) running on android 4.4.4. (I can give you more details if needed).
I need to install an application (EHTERAZ) which is a Qatari government application that only works on android version 6 and up (or IOS 13.5 and up).
Q: Is there a way to make the application work on my 4.4.4 android ?
Q: if not, how can I safely and easily upgrade my android to a newer version? (can you give me a full tutorial or video link)
Q: how to choose an android version that is most suited for my S4 that won't make it too slow or drain the battery too fast ?
Q: will I loose my files during this process ?
Thank you so much for your help, I really appreciate it.
It's the app developer who defines what Android version at minimum is required to run the app.
Upgrading Android requires phone's bootloader gets unlocked ( you lose all your data when doing this ), then a Custom Recovery ( what must be at 100% suitable to the phone ) gets flashed and finally via this Custom Rrcovery a Custom ROM ( what must be at 100% suitable to the phone ) gets flashed.
Hint: Add Galaxy S4 (SGH-M919 to front of this thread's title thus mainly owners of such a phone get addressed.
jwoegerbauer said:
It's the app developer who defines what Android version at minimum is required to run the app.
Upgrading Android requires phone's bootloader gets unlocked ( you lose all your data when doing this ), then a Custom Recovery ( what must be at 100% suitable to the phone ) gets flashed and finally via this Custom Rrcovery a Custom ROM ( what must be at 100% suitable to the phone ) gets flashed.
Click to expand...
Click to collapse
thank you for your reply jwoegerbauer. I'm not familiar with the terms you used (bootloader, flash, rom) so I'm not able to perform this by myself. Is there any tutorial or video you suggest I follow?
Greetings,
I succeeded in installing android 6 on my S4 and I made the application work fine.
I first installed twrp (twrp-2.8.7.0-jfltetmo.img) using Odin on my PC. I used twrp to wipe my stock system and to install the custom rom (cm-13.0-20161218-NIGHTLY-jfltetmo), in addition to Gapps (arm-6.0-pico).
As simple as that.
The latest twrp and the latest LineageOS that are (allegedly) compatible with my phone and listed in their official websites don't work on my phone, so I had to find older versions to make this happen.

Question How to downgrade android version?

Hi,
After my S21+ updated to android 13, my phone often lost signal, did not receive messages and calls. I want to roll it back to android 10 but don't know how to do it.
I found a few tutorials to find the factory images and do flash-all using adb, but I don't know where I can find the factory images of the S21+.
Please guide me in detail if you can.
Sincerely thank you.
First you should unlock your bootloader from official source.
Then browse through incognito mode via any third party browser about official Android 10 rom package for your device.
Find your device manufacturers website from the results and download the package and update through default updater Or flash using official flash tool (recommended).
Remember rolling back or downgrade Android version can brick your device
Depending on how the device is programmed.

Categories

Resources