My experiences in flashing various custom ROM's and sound mods. - Android Q&A, Help & Troubleshooting

I am sharing my experiences to all the people who are working with custom ROM's and sound mods to make their life easier. I am providing lot of tip's.
I have successfully flashed sound mod called xtreme music and I think that any sound mod can be installed successfully by following my procedure.
I have failed in flashing various sound mods upto 100's of times into latest custom ROM's. Flashing sound mod into Android naught custom ROM's was easy but flashing sound mod into latest custom ROM's is very difficult.
I am going to describe what I have done in the following steps
1) First make sure that you have latest twrp recovery manager and I have chosen redwolf version 027 which is the latest.
2)Take backup of all the partitions of your device like system, data, firmware, WiFi,Bluetooth etc.,.
3)go to advanced wipe and select all the partitions except microsd and USB storage and then wipe.
4)before going to flash a custom ROM we need to flash a firmware of the device and so I have chosen fw_mido_miui_HMNote4XGlobal_V10.1.1.0.NCFMIFI_707a693088_7.0.zip
5)install the custom ROM zip file of your device and then install the gapps zip file.
6)do not reboot automatically and instead wipe cache and dalvik cache in the recovery manager and then reboot.
7)after rebooting and completing setup go to settings and enable android debugging.
8)instalcalledattachment attachment filenameMagiskManager-v7.1.1
9)download the file called attachment filenameMagisk-v18.1 from internet.
10)open magisk manager and try to flash the above mentioned zip file. Please do not try to flash the magisk zip file with in recovery manager because it will not work. In the magisk manager also you will definitely fail upto 3 to four times but keep go on trying and at one moment you will succeed.
11)install the xtrememusic zip file and I have chosen XTREMEMusic_MAGISK_OFICIAL_By_androidexpert35.zip. I am suggesting to flash magisk version of xtrememusic.
12)After rebooting everything worked fine.
To make sound mod work properly I think that magisk is must.
After flashing custom ROM with in the oldest version of recovery manager the device may not work properly.
In order to flash arise sound mod I am suggesting to make magisk is working properly. When you try to flash the zip file Arise Magisk Compatibility Module v4.0 in recovery manager it will show error as magisk module not found.
I am also suggesting seriously not to flash at any time the flash file starting with attachment filenameMagisk-uninstaller because your device would not boot properly.
In the recovery manager many times you may see errors such as "unable to mount storage", "unable to mount /data no such process found" etc.,. In order to get rid of this go to advanced wipe and select data partition and then select change file system type option and after that select ext4. Now I think so everything works fine in recovery manager.
Regards,
Rupesh

Related

[Q] Trying to install new rom

So, i am trying to load this new ROM (the Vicious rom). I go into clockwork recovery & select install zip from sdcard, then i choose zip from sdcard, & instead of loading the new rom it says: Finding Update package, opening update package, installing update package, then it is complete....how do i get it to load the rom?
additional info:
I cannot install any ROM now, it runs through this short update process I explained above. Am I missing something that allows the rom to be loaded?
That's how roms are installed. Did you reboot after you installed the rom?
i had issues with clockwork so i used team win recovery here-- http://www.mediafire.com/?ye85b3n1f72nen3
Maybe try this one and see if it helps just put on root of sd card
make sure it is named PG05IMG.ZIP go into the bootloader
by shutting down phone rstarting by holding down volume arrow then power till it comes up in bootloader and do the update
benualson said:
So, i am trying to load this new ROM (the Vicious rom). I go into clockwork recovery & select install zip from sdcard, then i choose zip from sdcard, & instead of loading the new rom it says: Finding Update package, opening update package, installing update package, then it is complete....how do i get it to load the rom?
additional info:
I cannot install any ROM now, it runs through this short update process I explained above. Am I missing something that allows the rom to be loaded?
Click to expand...
Click to collapse
Either you are choosing apply sdcard:update.zip accidentially instead of "install zip from sdcard" or you still have a PG05IMG on your sdcard? If you still have that img on your card, you will have to hook your phone up to your computer > boot into recovery > mounts and storage > mount sdcard > enable usb and find that IMG and delete it. Then go back do your wipes, and install zip from sdcard.
Try redownloading the ROM in case it may have been corrupted during the original download.

[Q] Installing new ROMS in the phones

Installing new ROMS should be as simple as
1.copying installer file say install.zip in the external SD card
2.break boot sequence by the press of some key combinations to invoke installer
3.mount external hard drive
4.bring up a explorer to choose the install file
5.install.
6.reboot.
All backups to be taken before to the external SD
which could be restored after rebooting in the new OS.
Why it is not simple like this?
Google has to do some work on this one ASAP.
xdadevelopers has to do something on this one first.
N Rajeaswar said:
Installing new ROMS should be as simple as
1.copying installer file say install.zip in the external SD card
2.break boot sequence by the press of some key combinations to invoke installer
3.mount external hard drive
4.bring up a explorer to choose the install file
5.install.
6.reboot.
All backups to be taken before to the external SD
which could be restored after rebooting in the new OS.
Why it is not simple like this?
Google has to do some work on this one ASAP.
xdadevelopers has to do something on this one first.
Click to expand...
Click to collapse
Really?
Google isn't responsible for all these things. It just releases source codes and developers develop it for their respected phones.
Common steps for flashing custom ROM are;
1.Unlock Bootloader (if locked)
2.Flash custom recovery
3.Backup stock ROM
4.Wipe system+data
5.Install ROM.zip
6.Install GApps
7.Wipe cache+dalvic cache
8.Reboot
If you followed every step, you'll just need near about 30Mins and Your new ROM will be installed successfully.
For some phones, their manufacturer don't allow them to flash custom ROM.
As flashing custom ROMs is experimental and one can mess up its phone, manufacturer do not provided warranty for such messed up phone. As noobs can do it easily.
So, the main reason is 'manufacturer' who takes care of their consumers for not messing up their phone and do not provide flexibility for flashing custom ROMs
Hope found this helpful
Regards,
hitman-xda

Can't install GAPPs on Galaxy S2 GT-I19100 Android 6.0.1

Looking for some help.
I tried to update my old Samsung Galaxy S2 to Android 6.0.1 - while I did this successfully, I wasn't aware that I needed to increase the system partition size, so the GAPPs installation failed.
I thought that once the system partition size was increased, then I would be able to just go back and unzip the GAPPs file in recovery mode, but now when I enter recovery mode it's Cyanogenmod recovery which doesn't have an option to open zipped files from the SD card.
I have tried unzipping GAPPs via file manager on the phone, but it says that the file is too large.
I'm new to this, but feel that if I could just get back to the old TWRP recovery with the unzip option I could just wipe everything and reinstall everything from the mini SD card, but with no such option with the Cyanogenmod recovery I'm stumped as to what to do next.
Any thoughts on where to go from here would be very much appreciated.
Jimsin said:
Looking for some help.
I tried to update my old Samsung Galaxy S2 to Android 6.0.1 - while I did this successfully, I wasn't aware that I needed to increase the system partition size, so the GAPPs installation failed.
I thought that once the system partition size was increased, then I would be able to just go back and unzip the GAPPs file in recovery mode, but now when I enter recovery mode it's Cyanogenmod recovery which doesn't have an option to open zipped files from the SD card.
I have tried unzipping GAPPs via file manager on the phone, but it says that the file is too large.
I'm new to this, but feel that if I could just get back to the old TWRP recovery with the unzip option I could just wipe everything and reinstall everything from the mini SD card, but with no such option with the Cyanogenmod recovery I'm stumped as to what to do next.
Any thoughts on where to go from here would be very much appreciated.
Click to expand...
Click to collapse
2 important things when updating to cm13:
Increase Partitiones to 1 GB System and 4 GB data
before flashing.
Flash isorec twrp recovery 3.0.2-1 before or together with rom and gapps.
All files are zip-files to be flashed with recovery.
Do not unzip this Files.
Read noob friendly Guide by Saber "want to update to cm 13 .....
You will find everything you need there.
Sent from my ME173X using XDA-Developers mobile app
Many thanks for the reply - yeah, I realise now that I should have increased the system partition size BEFORE CM13, but sadly I didn't.
My issue is now that I have no idea how to change the recovery mode back to something like TWRP that will allow me to unzip files again - I tried simply flashing it with ODIN, but it failed & I'm still stuck with CM13
Jimsin said:
Many thanks for the reply - yeah, I realise now that I should have increased the system partition size BEFORE CM13, but sadly I didn't.
My issue is now that I have no idea how to change the recovery mode back to something like TWRP that will allow me to unzip files again - I tried simply flashing it with ODIN, but it failed & I'm still stuck with CM13
Click to expand...
Click to collapse
You have to flash a Recovery whith Odin.
So i would repit again to bei Sure its done properly.
- in Odin Flash pitfile 1gb System _4 gb Data
together with Gustavo Kernel KK with cwm Recovery.tar (Flash Recovery in PDA and do not forget to tick on repartition)
- in cwm Recovery Format: mounts and storage/Format sd0 (Internal SD)/select "default"/swipe
- then wipe Data, Cache, System
- Install cm 13 + gapps + isorec twrp recovery 3.0.2-1.zip in ONE GO (do not reboot in between !!)
- reboot system
Sent from my ME173X using XDA-Developers mobile app
Follow my complete tutorial to do so. Odin not needed.
https://forum.xda-developers.com/galaxy-s2/help/guide-tutorial-samsung-galaxy-s2-i9100-t3538601

[APP] Dual Boot Patcher

Dual Boot Patcher - Dual boot any ROMs on your Galaxy Grand Prime VE
Huge thanks to @chenxiaolong for his wonderful app, bringing a new life to our device
Now let's get started!
This app patches...
Custom kernels for dual boot support
ROMs so that they can be installed as secondary
Google Apps packages for AOSP-based ROMs
SuperSU so that it can be used in the secondary ROM
NOTE: If you want to dualboot a TouchWiz ROM, I highly recommend installing TW as the primary ROM. Otherwise, any mods will need to be patched before flashing.
How to use the patcher
Android
Download the patcher apk and run it. Tap "Patch Zip File" from the navigation drawer and choose the file you want to patch.
Windows (GUI)
Double click DualBootPatcher.exe and choose the file you want to patch.
--------
After patching the zip file, a new file, like some_rom_dual.zip file will be created. For example, patching ktoonsez's
KT-SGS4-JB4.3-AOSP-TMO-08.28.2013.zip
would create a new
KT-SGS4-JB4.3-AOSP-TMO-08.28.2013_dual.zip
Instructions for dual booting
Before doing anything, download the Dual Boot Patcher app and the DualBootUtilities.zip from the download section below.
The patcher offers several locations for installing ROMs:
Primary: This is normally used for installing a zip to the primary ROM. It is not required, but is strongly recommended because it has code to prevent the zip from inadvertently affecting other ROMs.
Dual: Dual/Secondary is the first multiboot installation location. It installs to the system partition. This is a good spot for installing a second ROM because it doesn't take any space away from the internal storage.
Multi-slots: There are 3 multislots: multi-slot-1, multi-slot-2, multi-slot-3. These install to the cache partition. This is specifically for devices, like the Galaxy S4, that have a massive cache partition.
Data-slots: There can be an unlimited number of data slots. These install to the data partition and eat up space on the internal storage. This is useful for devices where the system partition is nearly full and the cache partition is tiny. These slots are named "data-slot-[id]", where "id" is something you provide in the app.
Extsd-slots: There can be an unlimited number of extsd slots. These install to the external SD card, which is useful as it keeps the ROMs off of the internal storage. Note that the ROM's data files are still stored on the data partition.
With that said, let's get to the "how to"!
First, boot into your primary ROM and install the Dual Boot Patcher app
Open the app and go to "Roms" in the navigation drawer. It will ask if you want to set the kernel. Make sure that you do.
Go to "Patch zip file" in the navigation drawer and patch the ROM or zip you want to install. You can select one of the installation locations described above.
There are two ways of flashing the patched zip file. You can either flash it normally from recovery or flash it using the in-app flashing feature. Both methods are explained below.
Flashing from recovery
To flash from recovery, just flash the patched zip file like you would for any other zip. Nice and simple.
In-app flashing
To use in-app flashing, go to "Roms" in the navigation drawer, tap the floating button on the bottom right, and add the zips you want to install. You can queue multiple zips and they will all be flashed in one go. Once you've added all the zips you want to flash, click the check mark in the action bar and they will be flashed right away.
A normal backup from recovery will backup every ROM. If you would like to back up ROMs individually, please see @rlorange's awesome tool: http://forum.xda-developers.com/showthread.php?t=2491299
How do I...?
Switch the ROM if something doesn't work properly?
You can flash the DualBootUtilities zip from recovery. It will provide a menu interface that allows switching to the various ROMs.
If you have TWRP, you can also switch manually by tapping Install -> Images (bottom right) -> Go to /sdcard/MultiBoot/[Your ROM]/ -> flash boot.img.​
Wipe /cache, /data, /system, or dalvik-cache?
The easiest way is to do it from the app while booted in another ROM. Just go to "Roms" in the navigation drawer, tap the 3 dots options menu for the ROM you want to wipe, and tap "Wipe ROM".
Alternatively, flash the DualBootUtilities zip from recovery, which will also allow you to wipe a ROM.
NOTE: Don't use the recovery's built-in wiping abilities as that may delete non-primary ROMs!​
Update the primary ROM?
Patch the zip for primary and flash it. The "primary" installation target is designed so that other ROMs won't be affected when you want to flash something for the primary ROM.​
Update a non-primary ROM?
Patch and flash the zip exactly like how you did it the first time.​
Flash a mod or custom kernel for the primary ROM?
Patch it for primary before flashing. If the zip does not wipe /cache, it is also safe to flash it directly.​
Flash a mod or custom kernel for a non-primary ROM?
Just patch and flash it ​
Downloads:
[LINK] Dual Boot Patcher
Source code:
DualBootPatcher: https://github.com/chenxiaolong/DualBootPatcher
Build instructions: https://github.com/chenxiaolong/DualBootPatcher/tree/master/docs
XDA:DevDB Information
Dual Boot Patcher, App for all devices (see above for details)
Contributors
doesntexits, chenxiaolong
Source Code: https://github.com/chenxiaolong/DualBootPatcher
Version Information
Status: Testing
Created 2016-12-20
Last Updated 2016-12-20
Reserved
Reserved
Thank you.

Boot multiple roms on nexus 6p using Dual boot patcher!

Haven't seen anyone else discussing this particular solution yet so figured I'd share that we can boot multiple roms using dual boot patcher by @chenxiaolong.
*The only things I'd recommend are the following:
*MAKING A BACKUP FIRST IN RECOVERY. Especially if you've never used the app, this helps in case you misunderstood something or didn't read enough or didn't think enough or the dog ate your homework.
*I recommend using TWRP version 3.0.3-0 which can be found here - https://dl.twrp.me/angler/
* I have not tried this with f2fs only ext4 so naturally I'd only recommend using ext4 partitioning on your device.
* If your device is encrypted in any way booting multiple roms will not work, which should be obvious but I'll state that anyways. Thanks @JKforUA for helping us figure this out.
*If you want to boot more than just two roms, that you use the data slot options for your roms which can be named anything you'd like and they will be stored on the phones internal storage.
* Make sure you're on the latest Radio and Bootloader for the nexus 6p, I flashed this and it works fine and is backwards compatible with Marshmallow roms.
Radio & Bootloader link -
https://forum.xda-developers.com/nexus-6p/general/nexus-6p-radio-bootloader-recovery-t3433637
* Use the patcher app to update the ramdisk and set your primary rom's kernel as Primary before patching or flashing anything.
*If you use the fingerprint scanner you'll have to delete the file /data/system/locksettings.db in each multi boot directory, this disables getting an incorrect pin error when switching roms.
*If using a marshmallow and nougat rom you'll need to flash the appropriate vendor image in recovery before boot.
*Vendor images should not be patched.
This process is fairly simple to me because I've been using it for years but if you have any questions feel free to ask in this thread and hit thanks if I helped ya.
* Before reporting errors I would suggest you try the following steps-
1. Make sure you're using this version of the patcher app because it is the one I have been using without issue -
Version 9.1.0r80-
https://dbp.noobdev.io/files/9.1.0....atcherAndroid-9.1.0.r80.gd5920b2-snapshot.apk
2. Make sure you have enough free space to have two of the zips you want to use because that is what you will have after you patch.
3. Make sure your path to the zip is correct when browsing for the zip, go through internal storage to the directory where the zip is.
4. If you get any error patching, uninstall the patcher app, re-download it, and reinstall it.
5. There is also a Windows version you can try if you prefer.
*If you are still having issues we can discuss it here, and if nobody can seem to come up with a fix in this thread then errors can further be reported by following instructions here - https://dbp.noobdev.io/downloads/
Credits - @chenxiaolong for the patcher app!
Links :
Dual boot patcher (All versions) - https://dbp.noobdev.io
Original forum - https://forum.xda-developers.com/showthread.php?t=2447534
* Screen shots of my current setup attached below for additional guidance if desired.
Status - sharing, using, in some cases testing, always learning (^_-)...
Thanks for sharing, I've never heard of this before. A few questions;
How similar/dissimilar to multirom is this?
Do I need a specific kernel, or will it with with any kernel?
I briefly read through the original thread, am I creating a zip that flashes two Roms, or is the zip something that flashes alongside the ROM I currently have?
Thanks for sharing. Used this on my further G4. Didn't know that our device is supported. So no need to wait until multirom is working on 7.1.1. Gonna play around now.
Where do we report errors? I was about to patch several files and the app crashed. I have a couple log files.
DaringDomino3s said:
Thanks for sharing, I've never heard of this before. A few questions;
How similar/dissimilar to multirom is this?
Do I need a specific kernel, or will it with with any kernel?
I briefly read through the original thread, am I creating a zip that flashes two Roms, or is the zip something that flashes alongside the ROM I currently have?
Click to expand...
Click to collapse
I actually prefer it because it's what I'm used to, you can patch whatever kernel you choose and flash it in recovery, reboot into that rom, open the patcher app, set kernel, profit.
Basically you patch the rom zip you want to flash as secondary, or in my case data slot, naming them 2 and 3 because the Multislot options won't flash anything for me but using data slots works fine. Patch rom, patch gapps, patch whatever kernel, flash all in the whatever succession recommended by the rom op, and you'll automatically boot into the newly flashed rom when you reboot.
OmegaBlaze said:
Where do we report errors? I was about to patch several files and the app crashed. I have a couple log files.
Click to expand...
Click to collapse
Hmmm I found this
https://forum.xda-developers.com/showpost.php?p=64727670&postcount=8259
I would try re-downloading the app because I haven't had it crash in any roms I've used yet, I just grabbed the latest build, installed, opened, granted root when prompted, updated the ramdisk if needed which is indicated the app, rebooted when prompted, set kernel, and done.
If it's still crashing for you there's the usual force closing the app from your roms settings and clearing the apps cache and data but you probably already tried that?
t83wood said:
I actually prefer it because it's what I'm used to, you can patch whatever kernel you choose and flash it in recovery, reboot into that rom, open the patcher app, set kernel, profit.
Basically you patch the rom zip you want to flash as secondary, or in my case data slot, naming them 2 and 3 because the Multislot options won't flash anything for me but using data slots works fine. Patch rom, patch gapps, patch whatever kernel, flash all in the whatever succession recommended by the rom op, and you'll automatically boot into the newly flashed rom when you reboot.
Click to expand...
Click to collapse
I'm gonna play with this over the weekend, I like new stuff!
So whatever fkashable zip I patch will be designated during the flash as secondary (or whatever) and won't overwrite my current ROM allowing it to exist along side it?
DaringDomino3s said:
I'm gonna play with this over the weekend, I like new stuff!
So whatever fkashable zip I patch will be designated during the flash as secondary (or whatever) and won't overwrite my current ROM allowing it to exist along side it?
Click to expand...
Click to collapse
Correct, so long as you don't patch it as Primary. It will tell you where it's flashing to in recovery. You can also use the dual boot patcher recovery zip for things like switching roms from recovery and wiping roms, wiping multiboot files will get rid of a rom in its entirety if you wanted to replace it with something else. I've always installed the patcher app in my other roms after first boot and used it to set the kernel for that rom too.
t83wood said:
Correct, so long as you don't patch it as Primary. It will tell you where it's flashing to in recovery. You can also use the dual boot patcher recovery zip for things like switching roms from recovery and wiping roms, wiping multiboot files will get rid of a rom in its entirety if you wanted to replace it with something else. I've always installed the patcher app in my other roms after first boot and used it to set the kernel for that rom too.
Click to expand...
Click to collapse
If I'm patching for the data partition, am I correct in making all zips (ROM, Gapps, and su) to the same name? (Ex. I named the ROM zip slot "rom2", and then used the same name for the other zips)
DaringDomino3s said:
If I'm patching for the data partition, am I correct in making all zips (ROM, Gapps, and su) to the same name? (Ex. I named the ROM zip slot "rom2", and then used the same name for the other zips)
Click to expand...
Click to collapse
Yep looks good!
t83wood said:
Yep looks good!
Click to expand...
Click to collapse
Awesome, thanks, I'll see what happens :good:
Edit: it worked! It's a little more involved than multirom, but it seems to be fine! Easier than I thought.
I've not yet switched between the two, but the app on the secondary (data slot) recognizes the primary
Wow great. Running great on data-slot. Even magisk is supported. Good to have a new playground. Happy to have the 128 GB variant. Gonna do some test with Viper.
How do I switch roms
All perfect. Viper running with magisk. Every rom i tried booting without any problem. So atm the perfect tool to test other rom!
---------- Post added at 11:45 AM ---------- Previous post was at 11:43 AM ----------
DEVILOPS 007 said:
How do I switch roms
Click to expand...
Click to collapse
Install dualpatcher app and choose rom in 'ROMs'. Then reboot. Or run utulities in twrp (install).
What do I do? It says failed error code - 1 tried doing cortex rom and selecting data. Is there something I need to do?
DEVILOPS 007 said:
What do I do? It says failed error code - 1 tried doing cortex rom and selecting data. Is there something I need to do?
Click to expand...
Click to collapse
Cortex also flashes the vendor. Maybe this gives the error because in dualboot all roms use the same vendor partition (could be a problem to flash vendor through dualpatcher...). All other roms i tried vendor was not included to flash (only rom und gapps separately). I am just trying cortex too (just ready to flash). Gonna report, if i succeed.
Donric13 said:
Cortex also flashes the vendor. Maybe this gives the error because in dualboot all roms use the same vendor partition (could be a problem to flash vendor through dualpatcher...). All other roms i tried vendor was not included to flash (only rom und gapps separately). I am just trying cortex too (just ready to flash). Gonna report, if i succeed.
Click to expand...
Click to collapse
Okay thanks Bro, I might try out lineage. Also open gaps failed for me bit do I need the rom first or do I need to use dynamic gaps? I appreciate the help!
DEVILOPS 007 said:
What do I do? It says failed error code - 1 tried doing cortex rom and selecting data. Is there something I need to do?
Click to expand...
Click to collapse
Cortex rom running fine on multiboot on my device. So no problem with vendor in multiboot. I can also switch back to another rom. As gapps i suggest you to use only dynamic gapps (banks gapps). I always use mini dynamic gapps. Opengapps give many problems.... On primary i got rr oms-release from 12.01. ATM running with 3 different rom all on internal sd card. Just pay attention to give always the same name when patching a zip file in dualpatcher.
Donric13 said:
Cortex rom running fine on multiboot on my device. So no problem with vendor in multiboot. I can also switch back to another rom. As gapps i suggest you to use only dynamic gapps (banks gapps). I always use mini dynamic gapps. Opengapps give many problems.... On primary i got rr oms-release from 12.01. ATM running with 3 different rom all on internal sd card. Just pay attention to give always the same name when patching a zip file in dualpatcher.
Click to expand...
Click to collapse
What do you mean by same name? I am on pimps rr oms and whenever I flash any rom it says error code - 1. Any idea what I can do?
DEVILOPS 007 said:
What do you mean by same name? I am on pimps rr oms and whenever I flash any rom it says error code - 1. Any idea what I can do?
Click to expand...
Click to collapse
Did you flash in twrp (3.0.3.0)? I only use twrp to flash a new multiboot rom. Before flashing a new rom just make sure, you patch all necessary zip files (rom, gapps, etc.). Same name means u choose where (on angler i always choose Data slot - this is internal sd card). Then you give the name (no capital letters) and choose the directory to save the patched file. This you do with every zip file for the rom u gonna flash. The new zip file have the original name and the text "....._data-slot-namegiven.zip" (example for data-slot). The part "data-slot-namegiven" should appeir in every name of the patched zip file. I think with our device it's goot to use the data-slot if you have enough space on your internal sd-card. Using Multi Slot could lead to space problems on system partition of the device. Then just flash the patched files one after another in twrp. Don't forget to flash also patched supersu.zip oder magisk.zip to get root (if it's not in the rom included). You need to patch gapps and supersu or magisk for each slot separately. The name of the patched file just says the path for the multiboot rom. So twrp flashes the patched zip to the right place. Sorry if i wrote to much. Hope it's gonna give you some help. More information you find in the original thread of multiboot.

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