Installing GSI Rom on Samsung S9 - Samsung Galaxy S9 Questions & Answers

Hi,
I am new to flashing GSI roms and have tried to flash Pixel Experience ROM via TWRP. When I do this and try to reboot nothing boots. I had originally wiped everything on the internal memory and installed from external SD card. Do I need to have some files from the stock ROM still installed when I install a GSI ROM? In other words, after installing TWRP from a stock ROM, should I only wipe, system, data, Dalvik and cache?
MIke

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Need help to install custom rom

Hello,
I don't know why my lg g3 phone doesn't want boot on custom rom.
I have the LG G3 d855 model, 16gb memory and here are my procedure to install every custom rom :
1. Flash Stock ROM using LGUP (the version of the firmware is not important but the possibility to root is)
2. Install KingRoot and get root
3. Install AutoREC and enter to the recovery
8. Flash Recovery TWRP 3.1.0-2
9. Reboot to the new recovery
10. ADVANCED WIPE (wipe cache, dalvik cache, data and SYSTEM)
11. Flash baseband 21C
12. Flash CUSTOM rom
13. Wipe cache and dalvik cache
14. Flash Gapp
15. Wipe cache and dalvik cache
16. Reboot
I think I did nothing bad...
but the phone does not start and it stays at the initial logo screen (not the LG logo, but the custom rom logo). I waited over 10 minutes to boot but nothing. Even though I install the identical rom again or install an anoter rom, each time the same issue.
This happens with all custom rom (xenonhd, resurrection remix, and now lineageOS)
I can use and boot on stock rom but each time I want to install a custom rom, my phone doesn't want to boot. The phone display stays at the initial rom logo screen.
It seems that I am alone to have this problem.
I don't know why and I search everywhere to find out the solution...
PS : My phone never restart by itself. I never have bootloop with my phone when I using stock rom and same with custom rom..
The problem is the boot with a custom rom. The phone don't want to boot and stay on logo loading...
Any suggestion may be help.
Thank you.
1. Once you installed TWRP you don't have to go back to stock to switch roms. From then on you can just download zips and flash them.
2. You need to delete everything (including system) except internal and external storage ( so you can still flash the zip for xceed, otherwise you will delete it). Remember that you will lose all your apps including your data with it. You can backup them with titanium backup tho. Pictures and video's will still be there as they are stored on the internal or external storage.
3. You also need to flash the GAPPS package after flashing rom, for xceed (7.1.1), pick nano (ARM)
4. Wipe cache and dalvik after flashing and reboot.
5. Make a backup before you do so !!!!!!
Good luck.
Jornwitt said:
1. Once you installed TWRP you don't have to go back to stock to switch roms. From then on you can just download zips and flash them.
2. You need to delete everything (including system) except internal and external storage ( so you can still flash the zip for xceed, otherwise you will delete it). Remember that you will lose all your apps including your data with it. You can backup them with titanium backup tho. Pictures and video's will still be there as they are stored on the internal or external storage.
3. You also need to flash the GAPPS package after flashing rom, for xceed (7.1.1), pick nano (ARM)
4. Wipe cache and dalvik after flashing and reboot.
5. Make a backup before you do so !!!!!!
Good luck.
Click to expand...
Click to collapse
Hello,
1. I think that but with specific rom, some people tell us to flash stock rom before flashing a custom rom. eMMC bug related ?
2. Deleting the system changes nothing because the system is wiped when I flash the rom, right ?
3. if the rom boot first then I will install Gapps. Else, I don’t install because the rom doesn’t want to boot.
1. Well .. I've been switching between fulmics,xceed,rr, .. etc without any problem so no, there is no need to go back to stock everytime.
2. Try it, you won't be able to boot until you flash a new rom, but it could help. That's why you take a backup in the first place. It is more 'clean' and if you don't try it you won't know.
3. Sometimes you have to flash gapps directly after the rom or you will be in for a bad time if you do afterwards.
Once you have TWRP recovery installed it's the easiest thing ever to flash a new rom. Make sure your zip files are downloaded okay. Download the MD3 to check it. Try to download via MEGA app or so, because browsers downloads tend to have errors sometimes.
Apart from that. Don't root via kingroot. They have had some suspicious cases where malware was installed on the phone when rooting.
If nothing's works. Go back to full stock through KDZ, root wit your PC, install TWRP via autorec, go to recovery, wipe everything, install modem 21C, install rom and gapps, wipe cache, reboot. Don't try anything other than that.
I have the same problem
Jornwitt said:
1. Well .. I've been switching between fulmics,xceed,rr, .. etc without any problem so no, there is no need to go back to stock everytime.
2. Try it, you won't be able to boot until you flash a new rom, but it could help. That's why you take a backup in the first place. It is more 'clean' and if you don't try it you won't know.
3. Sometimes you have to flash gapps directly after the rom or you will be in for a bad time if you do afterwards.
Once you have TWRP recovery installed it's the easiest thing ever to flash a new rom. Make sure your zip files are downloaded okay. Download the MD3 to check it. Try to download via MEGA app or so, because browsers downloads tend to have errors sometimes.
Apart from that. Don't root via kingroot. They have had some suspicious cases where malware was installed on the phone when rooting.
If nothing's works. Go back to full stock through KDZ, root wit your PC, install TWRP via autorec, go to recovery, wipe everything, install modem 21C, install rom and gapps, wipe cache, reboot. Don't try anything other than that.
Click to expand...
Click to collapse
Hello,
I have a question.
Can you give me a gapp 100% compatible with all custom rom with android 7.1.2, because i think opengapp are not reliable. Maybe the gapp will cause my issue and the rom won't boot.
Can i use this one https://forum.xda-developers.com/on...isited-slim-gapps-6-0-7-0-unofficial-t3462088 ?
I always use PICO version of gapp
Thank

How to install mokee rom ?

https://download.mokeedev.com/?device=sagit
I'm
Wipe all
Flash firmware 7.12.7 and try 7.11.26
Install rom
Install gapp
Wipe cache
Reboot
But my phone is bootloop
How to install mokee rom ?
Thanks all.
After installing rom, gapps, you need to format all data user. Then, you can reboot your device without any problem.
Format data is not wiping all, it's another button in twrp wipe

Pie Firmware Rom?

I just unlocked my Mix 2, but doing some looking before rooting. Is there any Roms that will work on Miui Beta Global 9.5.16? If all custom Roms are using 8.0 firmware, i guess i will wait to root this phone. If there is a Rom i can flash being on 9.0 firmware please let me know where to find it. Thank you.
Use the xiaomi.eu Roms, they are original Chinese MIUI Roms, but without any Bloatware Apps
https://xiaomi.eu/community/forums/miui-rom-releases.103/
If you browse through the forum you will find that most pie rom's have moved or are moving to pie firmware.
jkotte said:
Use the xiaomi.eu Roms, they are original Chinese MIUI Roms, but without any Bloatware Apps
https://xiaomi.eu/community/forums/miui-rom-releases.103/
Click to expand...
Click to collapse
How do I flash this rom? I never had luck with Xiaomi.eu roms but this time Imma do it again if I find someone who has working instructions.
Which recovery do I need? I'm currently on TWRP 3.2.3.0 (the official one from TWRP website)
What I do is
Wipe Data, Cache, System, Internal Storage everything. Even format data. Then copy the rom over into internal storage and flash it. Wipe cache again. Reboot system.
It always is stuck in loading.
Edit: I'm on Havoc OS-Pie currently.
dark_prince said:
How do I flash this rom? I never had luck with Xiaomi.eu roms but this time Imma do it again if I find someone who has working instructions.
Which recovery do I need? I'm currently on TWRP 3.2.3.0 (the official one from TWRP website)
What I do is
Wipe Data, Cache, System, Internal Storage everything. Even format data. Then copy the rom over into internal storage and flash it. Wipe cache again. Reboot system.
It always is stuck in loading.
Edit: I'm on Havoc OS-Pie currently.
Click to expand...
Click to collapse
Im on 9.5.23 eu, just wipe data caches system. If you are encrypted format data(im decrypted so i dont format sata) if you format sata reboot recovery and just install the zip. First boot may take longer than usual.
Sent from my Xiaomi MIX 2 using XDA Labs
dark_prince said:
How do I flash this rom? I never had luck with Xiaomi.eu roms but this time Imma do it again if I find someone who has working instructions.
Which recovery do I need? I'm currently on TWRP 3.2.3.0 (the official one from TWRP website)
What I do is
Wipe Data, Cache, System, Internal Storage everything. Even format data. Then copy the rom over into internal storage and flash it. Wipe cache again. Reboot system.
It always is stuck in loading.
Edit: I'm on Havoc OS-Pie currently.
Click to expand...
Click to collapse
Sorry for late response, i had this Problem too, bootlooping...
NEVER wipe System or Persist! Just FORMAT Data and install the Rom, i did it via ADB Sideload, worked perfectly

How to install xiaomi.eu when coming from an AOSP custom rom

How do i install xiaomi.eu when coming from an AOSP custom rom?
I was using Paranoid Android Quartz 4 (AOSP) for a good while now but it i want to go to xiaomi.eu because of the better battery management and other features.
I wanna know what's the right procedure to flash the rom. I am going to include the rom and custom kernel plus magisk on top.
Im confused as to which to wipe and/or format. Like which to do first and such before flashing the rom, kernel and magisk.
I'm using OrangeFox recovery because TWRP doesnt work on mine. Phone is ginkgo.
Thanks for the response
Wipe dalvik, cache, system, vendor, data. Flash rom, magisk. Reboot. If you face bootloop (most probably) then format data partition. You'll be okay.
Pavello said:
Wipe dalvik, cache, system, vendor, data. Flash rom, magisk. Reboot. If you face bootloop (most probably) then format data partition. You'll be okay.
Click to expand...
Click to collapse
Should i format data partition before flashing rom or should i do it after i face bootloop?
Thanks for replying
Format after flashing ROM. Formatting before flashing will wipe out internal storage.

TWRP Data encrypted. (Didn't have any lock pattern or code)

I tried installing Corvus OS 14.5
Here's what I did;
1.Downloaded and placed rom .zip into my phone files.
2.successfully Installed TWRP 3.5.0_10-UNIFIED
3.Wiped: Dalvik/ART Cache, System, Vendor, Cache, Data
4.Went to the install section, all folders in random letters and numbers.
Help!
And how do I get out from this situation.
Reflash stock ROM (MIUI 12) and try again with TWRP and Custom ROM.
wojownikhaha said:
Reflash stock ROM (MIUI 12) and try again with TWRP and Custom ROM.
Click to expand...
Click to collapse
I already did. Though, I think I should find a method to prevent this.

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