Havoc os 4.1 gsi for m21

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Sagarking

Senior Member
Feb 10, 2012
113
22
mobiletek.in
Havoc_Logo.png

Here is Havoc os 4.1 for Samsung galaxy m21

Make sure your device is unlocked bootloader and installed latest twrp also be on latest firmware. Make sure you have stock firmware in your pc if something goes wrong you can flash stock rom by odin. Also do a backup of your all data.

I will not responsible for anything.

Features

Highly customized stable fast android 11 gsi


Flashing Guide


In twrp
-Format Data
-wipe dalvic cach data
-reboot to recovery
-flash havoc os.zip
-flash multidisabler.zip/ disable dm Verity .zip / lattest magisk zip
-Reboot to system

Havoc os 4.1 gsi download

Known bugs

-MTP (you can use twrp mtp for transfering files)
-VOLTE (if your operator support 2g network you can still receive and make calls example airtel for India also 4g internet work without any problem)
-HOTSPOT (you can use usb tethering to share internet for pc but hotspot is a bug)
-AOD

Working
Everything else try yourself

How to root?

Flash magisk zip in twrp attached with and install magisk manager app

Screenshots 👇 click on spoiler to see screenshots
IMG_20210220_091706_775.jpg
IMG_20210220_091713_350.jpg
IMG_20210220_091711_196.jpg
IMG_20210220_091719_646.jpg
IMG_20210220_091715_331.jpg

Credits


@Nazim navas for zipping and upoloading Havoc os​
@soulr344 for making gsi flasher zip and twrp​
@ anurup jha for screenshots​
@Sagarking me for writing thread​
@Havoc team for awessome havoc gsi 4.1​
and all other who deserve creadits but not mentioned​
 

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Last edited:

Sagarking

Senior Member
Feb 10, 2012
113
22
mobiletek.in
Overlay fix
Flash attached file in twrp for cutting corners flash and forget

===================================
If you feel speaker volume is low use Dolby Atmos magisk module do YouTube search for that
 

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Last edited:

Sagarking

Senior Member
Feb 10, 2012
113
22
mobiletek.in
-Wifi hotspot is already fixed in lattest phh gsi so no need to run any script
-MTP also fixed by Prish kernel Gsi version 13 March build you will just need select file transfer in developer usb option
-Now you can directly flash gsi from lattest twrp so no need of zip you can download and install gsi yourself select install image and then install as a system in twrp also do wipe data cach data and system in wipe option of twrp.
- you need to extract gsi file example pixel.img.xz after extract pixel.img use zarchiever to extract
-camera go is best app for camera in gsi you can get it on apkmirror easily.
-download gsi from Here
-Downlooad arm64 a/b (ab) gsi image

Gsi Naming info

Information about what type of GSI it is

<ARCH>_xyZ

<ARCH> can either be arm, a64 or arm64
x can either be a or b
y can either be v, o, g or f
Z can be N or S

b = a/b
a = a-only

g = gapps
o = gapps-go
v = vanilla (no gapps included)
f = floss (free & open source apps instead gapps)

N = no superuser
S = superuser included
 

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Last edited:
-Wifi hotspot is already fixed in lattest phh gsi so no need to run any script
-MTP also fixed by Prish kernel Gsi version 13 March build you will just need select file transfer in developer usb option
-Now you can directly flash gsi from lattest twrp so no need of zip you can download and install gsi yourself select install image and then install as a system in twrp also do wipe data cach data and system in wipe option of twrp.
- you need to extract gsi file example pixel.img.xz after extract pixel.img use zarchiever to extract
-camera go is best app for camera in gsi you can get it on apkmirror easily.
-download gsi from Here
-Downlooad arm64 a/b (ab) gsi image

Gsi Naming info

Information about what type of GSI it is

<ARCH>_xyZ

<ARCH> can either be arm, a64 or arm64
x can either be a or b
y can either be v, o, g or f
Z can be N or S

b = a/b
a = a-only

g = gapps
o = gapps-go
v = vanilla (no gapps included)
f = floss (free & open source apps instead gapps)

N = no superuser
S = superuser included
Please mention TWRP version.
Where to install the img, on Prism, Optics or Super?
 
-Wifi hotspot is already fixed in lattest phh gsi so no need to run any script
-MTP also fixed by Prish kernel Gsi version 13 March build you will just need select file transfer in developer usb option
-Now you can directly flash gsi from lattest twrp so no need of zip you can download and install gsi yourself select install image and then install as a system in twrp also do wipe data cach data and system in wipe option of twrp.
- you need to extract gsi file example pixel.img.xz after extract pixel.img use zarchiever to extract
-camera go is best app for camera in gsi you can get it on apkmirror easily.
-download gsi from Here
-Downlooad arm64 a/b (ab) gsi image

Gsi Naming info

Information about what type of GSI it is

<ARCH>_xyZ

<ARCH> can either be arm, a64 or arm64
x can either be a or b
y can either be v, o, g or f
Z can be N or S

b = a/b
a = a-only

g = gapps
o = gapps-go
v = vanilla (no gapps included)
f = floss (free & open source apps instead gapps)

N = no superuser
S = superuser included
Which one is suggested for Samsung M21 from https://github.com/phhusson/treble_experimentations/releases/tag/v313

What else installation is required?
 

Fredin_

Senior Member
Feb 19, 2018
279
76
Samsung Galaxy M21
Which one is suggested for Samsung M21 from https://github.com/phhusson/treble_experimentations/releases/tag/v313

What else installation is required?
You can use the latest SHRP or PBRP or TWRP 3.5.2 to flash it. If you are using OFOX you'll have to flash dynapatch to make it work.
Flash the img file directly to system, not to super or other partitions

You can find a good list of GSIs here

You'll want to get ARM64 AB (ARM64 BGN) refer

As for additional steps, wipe data if you are coming from other roms
If it is bootlooping, you can try the following:
* flash multi disabler and format data
* flash magisk or if you don't want to root, flash dm verity disabler
* try a different kernel

guide
 

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  • 1
    Has anyone tried this successfully? Are there any disadvantages to doing this?
    1
    Wifi hotspot fix for Gsi
    Code:
    setprop persist.sys.phh.system_hostapd false
    run this script after su in terminal emalutor and restart

    Credit & Thanks to @soulr344