Database Users

Help downgrading from Nougat to Marshmallow and/or getting rid of System apps in N.

I have a problem with Nougat, and that is - i can`t deinstall system apps. I tried it with system app remover, but it fails on every app. Next i tried with a file manager, but that doesn`t work either. The folders + apk`s just won`t go away, even after a restart. Then i tried to deinstall some stuff via TWRP file explorer, but got a blank screen without any apps after loading into system again.
It wasn`t anything critical for the system to work (i know what i`m doing) so i don`t get where the problem is. I then tried to install Marshmallow, but got into a bootloop and had to reinstall Nougat.
So, if someone knows how to get rid of system apps on Nougat, or if you know how to downgrade, please tell me both. Thanks.

are you root? if so, i've had luck modifying system with Root Explorer. (not sure which explorer you were using)

tysoncrypto said:
I have a problem with Nougat, and that is - i can`t deinstall system apps. I tried it with system app remover, but it fails on every app. Next i tried with a file manager, but that doesn`t work either. The folders + apk`s just won`t go away, even after a restart. Then i tried to deinstall some stuff via TWRP file explorer, but got a blank screen without any apps after loading into system again.
It wasn`t anything critical for the system to work (i know what i`m doing) so i don`t get where the problem is. I then tried to install Marshmallow, but got into a bootloop and had to reinstall Nougat.
So, if someone knows how to get rid of system apps on Nougat, or if you know how to downgrade, please tell me both. Thanks.
Click to expand...
Click to collapse
I've had luck removing system apps with FX explorer, but I had to remount system R/W before it would let me. Also I'm rooted.

I'd advise against tying to downgrade from Nougat at this point, it has caused bricks for many people.

tysoncrypto said:
I have a problem with Nougat, and that is - i can`t deinstall system apps. I tried it with system app remover, but it fails on every app. Next i tried with a file manager, but that doesn`t work either. The folders + apk`s just won`t go away, even after a restart. Then i tried to deinstall some stuff via TWRP file explorer, but got a blank screen without any apps after loading into system again.
It wasn`t anything critical for the system to work (i know what i`m doing) so i don`t get where the problem is. I then tried to install Marshmallow, but got into a bootloop and had to reinstall Nougat.
So, if someone knows how to get rid of system apps on Nougat, or if you know how to downgrade, please tell me both. Thanks.
Click to expand...
Click to collapse
If you wish to get rid of system apps, simply flash via recovery, the lastest supersu vip; system[less], whichever your preference. If you haven't already flashed twrp after flashing Nougat, do so first.
Install Titanium Backup, and you're all set; I've done it myself and works as it should.
If you were trying to downgrade to Marshmallow, you'd need to do a backup + full wipe, and install the M bootloader, boot, system, etc, then you could restore a custom ROM backup, if you had one.

Heisenberg said:
I'd advise against tying to downgrade from Nougat at this point, it has caused bricks for many people.
Click to expand...
Click to collapse
At this point i would wait unless he signs up for the beta. Dozen of us have restored our phones
We flashed that it's over custom rom/ wrong steps to upgrade.

rbouza1 said:
At this point i would wait unless he signs up for the beta. Dozen of us have restored our phones
We flashed that it's over custom rom/ wrong steps to upgrade.
Click to expand...
Click to collapse
So can i downgrade to MM again? I'm on beta N7.0 ... No root.. No unlocked bootloader.. everything stock.. What do you think i should do to get back?? Can i root and flash MM over it..idk
Thanks in advance!!!

RidinNerdy said:
So can i downgrade to MM again? I'm on beta N7.0 ... No root.. No unlocked bootloader.. everything stock.. What do you think i should do to get back?? Can i root and flash MM over it..idk
Thanks in advance!!!
Click to expand...
Click to collapse
With out unlocked bootloader I don't really know. I guess you might be able to run a factory image . The latest from googles developers site .

spunks3 said:
are you root? if so, i've had luck modifying system with Root Explorer. (not sure which explorer you were using)
Click to expand...
Click to collapse
Thank you all for your answers. I didn`t bother trying another root explorer as i thought they`re all the same, but i will try the ones suggested here. And yes, the phone is of course unlocked and rooted with the latest twrp and supersu installed.

teh roxxorz said:
If you wish to get rid of system apps, simply flash via recovery, the lastest supersu vip; system[less], whichever your preference. If you haven't already flashed twrp after flashing Nougat, do so first.
Install Titanium Backup, and you're all set; I've done it myself and works as it should.
If you were trying to downgrade to Marshmallow, you'd need to do a backup + full wipe, and install the M bootloader, boot, system, etc, then you could restore a custom ROM backup, if you had one.
Click to expand...
Click to collapse
Thanks. I flashed the latest twrp and supersu before upgrading to Nougat, and they both made it through, so it`s all set up.
I think i`ll try to downgrade since i don`t see the big Deal with N as of now + i have a much worse mobile data signal after updating to it. It`s almost constantly on H instead of 4g /LTE.
If someone is interested in downgrading, here`s an exact instruction that i found here on XDA:
"Download the MM stock firmware and extract all of it to a folder. Then open a cmd/terminal in the download folder (shift and right click in windows I believe, just right click and there will be a option in linux).
Then do these steps in order BACK UP YOUR APPS!!"
fastboot flash bootloader bootloader.img
fastboot flash radio radio.img
fastboot reboot-bootloader
fastboot flash system system.img
fastboot flash boot boot.img
fastboot flash recovery recovery.img
The names will be a little different, and if you want twrp put it in place of the stock recovery!
PS: Don't flash userdata
If that fails, i`ll install titanium backup to at least get rid of all the google stuff, like music, photos etc.

Heisenberg said:
I'd advise against tying to downgrade from Nougat at this point, it has caused bricks for many people.
Click to expand...
Click to collapse
@Heisenberg Do you know of a safe way to downgrade our 6p from Nougat 7.1.1 on Pure Nexus to Marshmallow?

jt1998 said:
@Heisenberg Do you know of a safe way to downgrade our 6p from Nougat 7.1.1 on Pure Nexus to Marshmallow?
Click to expand...
Click to collapse
When I got my phone back after RMA from the BLOD it was on 7.0 and the first thing I did was flash a 6.0.1 factory image. I picked the same build number as the last Pure Nexus build in MM. I don't think flashing factory images through fastboot is a big risk as long as you are paying attention and following a good plan. Any other opinions are welcome.
Sent from my Nexus 6P using XDA-Developers Legacy app

tysoncrypto said:
Thanks. I flashed the latest twrp and supersu before upgrading to Nougat, and they both made it through, so it`s all set up.
I think i`ll try to downgrade since i don`t see the big Deal with N as of now + i have a much worse mobile data signal after updating to it. It`s almost constantly on H instead of 4g /LTE.
If someone is interested in downgrading, here`s an exact instruction that i found here on XDA:
"Download the MM stock firmware and extract all of it to a folder. Then open a cmd/terminal in the download folder (shift and right click in windows I believe, just right click and there will be a option in linux).
Then do these steps in order BACK UP YOUR APPS!!"
fastboot flash bootloader bootloader.img
fastboot flash radio radio.img
fastboot reboot-bootloader
fastboot flash system system.img
fastboot flash boot boot.img
fastboot flash recovery recovery.img
The names will be a little different, and if you want twrp put it in place of the stock recovery!
PS: Don't flash userdata
If that fails, i`ll install titanium backup to at least get rid of all the google stuff, like music, photos etc.
Click to expand...
Click to collapse
Dude, does it fixes your lte issues? Because i am facing the same problem with my nexus 6p + android 7.1.1.

I personally have never had lte issues on any build, 6.x.x or 7.x.x on any custom rom or stock.
Sent from my Nexus 6P using XDA-Developers Legacy app

https://developers.google.com/android/images You need a complete factory image flash, including /data.
I had LTE problems from 7.1.2b to 7.1.1 (while I didn't have them on 7.1.1 before switching to 7.1.2b) and they were solved by factory reset.

Questions on upgrading

Hello,
i'm a new user and i have a question for you guys. I have my P8Lite with:
- unlocket bootloader TWRP 3.0.2-0
- rooted
- firmware 5.0.1
(i used to write little scripts for school project that used my phone so i had to access root-locked functionalities)
my friends recently recived and update for their phone but i tried to do it (OTA and local) and didnt work.
Could please someone explain to me why i cant update my firmware? What's keeping me from doing so?
If i need to give up on root/custom recovery i can do that. I just want to know how to get the last stock firmware on my phone.
Thanks a lot.

SuperAntani said:
Hello,
i'm a new user and i have a question for you guys. I have my P8Lite with:
- unlocket bootloader TWRP 3.0.2-0
- rooted
- firmware 5.0.1
(i used to write little scripts for school project that used my phone so i had to access root-locked functionalities)
my friends recently recived and update for their phone but i tried to do it (OTA and local) and didnt work.
Could please someone explain to me why i cant update my firmware? What's keeping me from doing so?
If i need to give up on root/custom recovery i can do that. I just want to know how to get the last stock firmware on my phone.
Thanks a lot.
Click to expand...
Click to collapse
You need to give up twrp. Also make sure you download correct region/model firmware otherwise it may fail or give you many bugs. Especially balong bug. After updating your phone will automatically unroot and probably your data will be erased. So backup your data to avoid any loss.

Suleiman01 said:
You need to give up twrp. Also make sure you download correct region/model firmware otherwise it may fail or give you many bugs. Especially balong bug. After updating your phone will automatically unroot and probably your data will be erased. So backup your data to avoid any loss.
Click to expand...
Click to collapse
Ok, let's say i install the original recovery, i then should be able to update to the latest version.
At that point will i still be able to re-install twrp and re-root?
(I think bootloader should remain unlocked)

SuperAntani said:
Ok, let's say i install the original recovery, i then should be able to update to the latest version.
At that point will i still be able to re-install twrp and re-root?
(I think bootloader should remain unlocked)
Click to expand...
Click to collapse
After you successfully updated your phone to Android 6.0 you may root it again or install twrp.
Bootloader should remain unlocked. There is no need to lock it.

Suleiman01 said:
After you successfully updated your phone to Android 6.0 you may root it again or install twrp.
Bootloader should remain unlocked. There is no need to lock it.
Click to expand...
Click to collapse
That's marvelous. I'll do that as soon as i can and i'll post the outcome

It all worked properly, i installed stock recover > OTA update > re-installed custom recovery.
Now i have the lastest update with custom recovery.
I had some troubles with root tho, i made a backup then installed the latest version of SuperSU through TWRP but it soft bricked my phone so i had to restore the backup.
I gave up on root because i dont need it but it would be nice to know what went wrong there.
Anyway it all works fine and i kept my files and apps.
Thanks a lot buddy

RS988 21d OTA in the wild

The RS988 finally has a new OS update with Google patch level Dec 1st, and that means that we are finally good against blueborne and krack!
Sent from my RS988 using Tapatalk

I just installed it. It's about time. I was beginning to wonder if they had stopped support on the RS988. I hear the LG G5 is supposed to get Oreo, but I have a feeling that the RS988 will get left out based on how the updates have gone so far.

Hi! Has the modem changed?

I rooted my device with SuperSU and TRWP, is it advisable install this update? Won't it remove or disable the root access?

Nispero said:
I rooted my device with SuperSU and TRWP, is it advisable install this update? Won't it remove or disable the root access?
Click to expand...
Click to collapse
From what I know, in order to get the ota your bootloader needs to be the stock one, but I could not find it outside of full kdz packages.
I have not rooted yet waiting for this specific update (given the security fixes).
I would suggest you to backup all of your apps and settings with an app like Titanium Backup, flash stock, install the ota, reinstall TWRP, root and magisk and then restore apps and settings from the backup
Sent from my RS988 using Tapatalk

kattolo said:
From what I know, in order to get the ota your bootloader needs to be the stock one, but I could not find it outside of full kdz packages.
I have not rooted yet waiting for this specific update (given the security fixes).
I would suggest you to backup all of your apps and settings with an app like Titanium Backup, flash stock, install the ota, reinstall TWRP, root and magisk and then restore apps and settings from the backup
Sent from my RS988 using Tapatalk
Click to expand...
Click to collapse
Sorry for asking, but where do I get the flash stock? I loaded SuperSU-v2.82-SR5-20171001224502.zip and TWRP-3.0.2-1-RS988.img to root after unlocking the bootloader

spinoza_web said:
Hi! Has the modem changed?
Click to expand...
Click to collapse
I'm not completely sure (did not write down the previous baseband)
I'm attaching the current info

Nispero said:
Sorry for asking, but where do I get the flash stock? I loaded SuperSU-v2.82-SR5-20171001224502.zip and TWRP-3.0.2-1-RS988.img to root after unlocking the bootloader
Click to expand...
Click to collapse
the best source of full stock roms as well as info on the phone I could find so far is https://forum.xda-developers.com/lg-g5/how-to/info-autos-g5-thread-t3350648

The way I had to update was to flash 21a and then take OTA's up to 21d because when I flashed 21c back to stock using TWRP and tried to update it gave me an error and then rebooted and said I can't update because I had rooted the device.

kattolo said:
I'm not completely sure (did not write down the previous baseband)
I'm attaching the current info
Click to expand...
Click to collapse
Here's the baseband version with RS98821c: MPSS.TH.2.0.c1.4-00047-M8996FAAAANAZM-1.88674.1.101802.1
The numbers are slightly different at the end compared to RS98821d , but I'm not sure what if anything might have changed.

maybe, for getting OTA should we just get unroot? How to do it properly?

If recovery is not the stock one, it will not be possible to install the OTA.
Alternatively you might need to wait for someone to make a flashable zip you could flash with TWRP, but given the fact development on this phone is not too active you might need to wait for a while before is available
Sent from my RS988 using Tapatalk

Awkydee said:
The way I had to update was to flash 21a and then take OTA's up to 21d because when I flashed 21c back to stock using TWRP and tried to update it gave me an error and then rebooted and said I can't update because I had rooted the device.
Click to expand...
Click to collapse
I was also planning on flashing the complete 21c zip so that I could take the 21d OTA. Glad to know that might not work.
Anyone know if it would be possible to install just the stock 21c recovery image? It's my understanding that having a custom recovery installed is what makes the OTA installation fail. If TWRP is what's getting in the way of installing the OTA, wouldn't replacing TWRP with stock recovery solve the problem without touching the system? If anyone who knows more about this stuff than me could chime in, I'd appreciate it.

brewerywagon said:
I was also planning on flashing the complete 21c zip so that I could take the 21d OTA. Glad to know that might not work.
Anyone know if it would be possible to install just the stock 21c recovery image? It's my understanding that having a custom recovery installed is what makes the OTA installation fail. If TWRP is what's getting in the way of installing the OTA, wouldn't replacing TWRP with stock recovery solve the problem without touching the system? If anyone who knows more about this stuff than me could chime in, I'd appreciate it.
Click to expand...
Click to collapse
First I flashed the magisk uninstaller and rebooted back to recovery. Then I flashed the 21c COMPLETE ZIP and didn't flash magisk so it would replace TWRP with the stock recovery on reboot. Then I rebooted and when I tried to update it went to the stock and threw up an error then rebooted. Upon reboot it displayed a message saying that I couldn't update because my device had been rooted. So I rebooted back in to bootloader and flashed TWRP again. Then I flashed 21a COMPLETE ZIP and no magisk so that the stock recovery would replace TWRP. I rebooted and went through setup and took OTA updates until I was on 21d. Then rebooted back into bootloader and flashed TWRP. Then rooted and we've through setup. I tried every other way but this was the only way that worked for me. I hope it helps!

should be an easier way. Did u see some changes to the radio?

Some of you may remember that last year I had the misfortune of installing the Brightpoint ROM on my Unlocked G5, which completely messed the phone up by not allowing it to connect to AT&T's LTE. It was a process to re-flash the older ROMs/Bootloader and then rebuild it to a stable 21c. I had used it for a while like that, and the only problem I had was that when ending a voice call (HSPA) it would take a while to change back to LTE.
I ended up going with the S8 over the summer (Samsung discount + Note 2 trade in) which got it for $18/month. I've been using it ever since and the LTE to HSPA Voice to LTE change-off on the S8 is done within a second, unlike the G5.
My mom had been using an unlocked Samsung S5 for almost a year now, and it's constantly dropping calls, and this past week it froze on her and required a battery pull, so was thinking of having her try out my (unused) G5 to see if she liked it more. When I turned the G5 on today, I updated all the apps, and then installed the 21d OTA update. The hand-off from voice to LTE still is not as fast as my S8, but seems to be improved from the 21c firmware.

ROM Posted
Just to let you all know, I have posted the latest 21d stock ROM in my thread here: https://forum.xda-developers.com/lg-g5/development/stock-21c-roms-flashable-zips-imgs-t3679907

Hi. After 21d received my phone starts to rebbot when I try to play music on phone. No matter if this is stock player or google music. After self reboot music plays normally but if I click pause and wait until first stand by mode, the problem returns. Want to ask you guys to check if you have the same problem or I should download full version of 21d and check if the problem still exists. Thanks.

ingressor said:
Hi. After 21d received my phone starts to rebbot when I try to play music on phone. No matter if this is stock player or google music. After self reboot music plays normally but if I click pause and wait until first stand by mode, the problem returns. Want to ask you guys to check if you have the same problem or I should download full version of 21d and check if the problem still exists. Thanks.
Click to expand...
Click to collapse
I'm not having any reboot issues when playing music.

Stuck in TWRP after pushed upgrade 28s

This morning I my phone pesented itself in TWRP.
Maybe this is because over the past days I repeatedly got notifications that a system upgrade wanted to install itself (I have a modified 26s X720 from Tora33).
I rejected those notifications.
Now I am stuck in TWRP and I cannot get around it. What I tried:
Reinstalling previous firmware (Tora33 26s) still on the phone
Restoring a TWRP backup from 6 months ago (TWRP didn't see it, maybe it's from a previous TWRP version, I now have v. 3.1)
Flash via fastbood factory image using Mauro's Tool All In One (error message "can't find file mke2fs.conf")
Wipe data, cache, dalvik cache, system; then install Mauro_V2.2 cleansed 23s firmware which I transferred to the phone
Every time it boots up in TWRP.

Your bricked you never flash ota with twrp you should read before doing anything.
The only thing that can help is ofil.
I suggest you study well before trying it.
Sent from my LEX720 using xda premium

mchlbenner said:
Your bricked you never flash ota with twrp you should read before doing anything.
The only thing that can help is ofil.
I suggest you study well before trying it.
Click to expand...
Click to collapse
Oh boy. Thanks anyway. OTA flashed itself, couldn't stop it. Maybe I made it worse by trying to fix.
The bootloader is not locked according to the AIO tool. I can flash succesfully any firmware, only after flashing the phone will still boot in TWRP. It is strange it still boots in TWRP. Is there no simpler trick like flashing the standard recovery and then flashing OFW?
You mention Ofil; do you think the guide described here work?

Wortelstok said:
Oh boy. Thanks anyway. OTA flashed itself, couldn't stop it. Maybe I made it worse by trying to fix.
The bootloader is not locked according to the AIO tool. I can flash succesfully any firmware, only after flashing the phone will still boot in TWRP. It is strange it still boots in TWRP. Is there no simpler trick like flashing the standard recovery and then flashing OFW?
You mention Ofil; do you think the guide described here work?
Click to expand...
Click to collapse
Yes, that QFIL guide is for the x720.

In my opinion, the best way to return stock is to push update.zip into phones main folder, then install stock recovery, then in this one install update zip then check that OS is working. If it is, then go into twrp and wipe. Can't do it?
I'll mention myself;
https://forum.xda-developers.com/le-pro3/how-to/guide-simple-to-return-to-stock-x720-t3618658

marik1 said:
In my opinion, the best way to return stock is to push update.zip into phones main folder, then install stock recovery, then in this one install update zip then check that OS is working. If it is, then go into twrp and wipe. Can't do it?
I'll mention myself;
https://forum.xda-developers.com/le-pro3/how-to/guide-simple-to-return-to-stock-x720-t3618658
Click to expand...
Click to collapse
If he was just going back stock that would work he flash 28s ota with twrp so this will not work.
Sent from my LEX720 using xda premium

No brick after OFW push 28s
The pushed (unvoluntary) update didn't brick my phone after all. This may be important for those that have modified stock ROMs with TWRP.
Not being able to restore OFW was a bug in Mauro's All-in-One tool which he fixed last night. After I could easily flash 20S or 26S stock from his repository. I would also recommend this as safest/easiest procedure. Afterwards you can just flash TWRP from the same tool and move from there.
By the way, immediately after flashing 20s the FW notified it wanted to update itself, again!
n my opinion, the best way to return stock is to push update.zip into phones main folder, then install stock recovery, then in this one install update zip then check that OS is working. If it is, then go into twrp and wipe. Can't do it?
Click to expand...
Click to collapse
Might have tried that

Updating to Oreo without losing root?

Hello, I recently got an exynos S8 and ai already installed TWRP and magisk. Is there a way to update to Oreo without losing my data and root? I barely finished setting everything up and it would be annoying to start over with a wipe

So, if We flash twrp straight after updating to oreo all data will be lost?

Use Titanium backup to get all your data back
I often change of custom ROM and I always keep all my data thanks to it
For the root, you will certainly lose it. But it takes 2min to flash the necessary file and get your root back

BigBen60 said:
Use Titanium backup to get all your data back
I often change of custom ROM and I always keep all my data thanks to it
For the root, you will certainly lose it. But it takes 2min to flash the necessary file and get your root back
Click to expand...
Click to collapse
Sounds good.Wll I have to reinstall TWRP too?

aleessio said:
Sounds good.Wll I have to reinstall TWRP too?
Click to expand...
Click to collapse
Not if you flash the ROM from TWRP.
But you will probably have to reinstall TWRP if you flash your ROM from Odin

BigBen60 said:
Not if you flash the ROM from TWRP.
But you will probably have to reinstall TWRP if you flash your ROM from Odin
Click to expand...
Click to collapse
Can you point me to an official Oreo build I can flash trough TWRP? All guides I found use odin.

aleessio said:
Can you point me to an official Oreo build I can flash trough TWRP? All guides I found use odin.
Click to expand...
Click to collapse
I'm afraid it's not possible.
Once you flash TWRP, you change the official recovery to a custom one. Once it's done, you can't get OTA anymore for example. So no more official stuffs.
If you want to get the lastest official build, you should use Odin. But it will also flash the official recovery and it will replace TWRP. So if you still want TWRP you'll have to flash it again (through Odin too and after you flashed the official firmware). But at this moment you'll lose official OTA

BigBen60 said:
I'm afraid it's not possible.
Once you flash TWRP, you change the official recovery to a custom one. Once it's done, you can't get OTA anymore for example. So no more official stuffs.
If you want to get the lastest official build, you should use Odin. But it will also flash the official recovery and it will replace TWRP. So if you still want TWRP you'll have to flash it again (through Odin too and after you flashed the official firmware). But at this moment you'll lose official OTA
Click to expand...
Click to collapse
I feared that from my experience with previous devices. I'm not so scared to reinstall TWRP and root as much as to lose my data, as I have a lot of apps that are annoying to reinstall (such as two factors authenticators or banking apps). I was thinking to try what they suggest in this post. But then, to install TWRP and root I would still need to wipe data, so it doesn't really solve my problem.
When you backup apps using titanium backup, do apps keep their data and configurations? For example, do you need to set again google authenticator or do you lose all access to your account?

aleessio said:
I feared that from my experience with previous devices. I'm not so scared to reinstall TWRP and root as much as to lose my data, as I have a lot of apps that are annoying to reinstall (such as two factors authenticators or banking apps). I was thinking to try what they suggest in this post. But then, to install TWRP and root I would still need to wipe data, so it doesn't really solve my problem.
When you backup apps using titanium backup, do apps keep their data and configurations? For example, do you need to set again google authenticator or do you lose all access to your account?
Click to expand...
Click to collapse
You keep everything as long as you restore app + data