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[ROM][12.0][cepheus] ArrowOS [Twelve][STABLE][OFFICIAL][2021/10/31] by Lamjiidii1

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Netvetra

Senior Member
Nov 20, 2016
58
19
@lamjiidii1 thanks for your nice work! It works very well.

I wiped, flashed the ROM, flashed latest euro firmware, formated data. Except for an error message saying something wrong about speech recognition on first boot, everything works very well!
 

Paola17

New member
Nov 7, 2021
1
0
Xiaomi Mi 9
Try different firmware, reflash rom with full wipe, I'm using eea fw with no issues with 5GHz WiFi
help friend I want to install this rom but see I'm a novice I have a Xiaomi Mi 9

I would like you to help me with all the steps that I must follow 😃
I don't want to ruin my cell phone because I use it to pass my classes I don't like it anymore, miui uses a lot of battery

I want you to help me from the beginning I do not have the Bootloader unlocked please do not ignore me 🙏🙏🙏🙏😔🤗
 

beastbrain

Senior Member
Jul 4, 2018
79
30
help friend I want to install this rom but see I'm a novice I have a Xiaomi Mi 9

I would like you to help me with all the steps that I must follow 😃
I don't want to ruin my cell phone because I use it to pass my classes I don't like it anymore, miui uses a lot of battery

I want you to help me from the beginning I do not have the Bootloader unlocked please do not ignore me 🙏🙏🙏🙏😔🤗

Well this ROM drains battery fast so don't switch for that reason, there are many instructions all over the forum, just check first page

It seems to drain a lot of battery on standby and on calls compared to 11 roms
I get 3SOT compared to 5-6, hardly making it through the day,
other than that the rom is very snappy and smooth,
I didnt notice any major bugs but sometimes it feels that internet is slow even with good reception, not sure why
 
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03jack

Member
Aug 6, 2017
22
3
Well this ROM drains battery fast so don't switch for that reason, there are many instructions all over the forum, just check first page

It seems to drain a lot of battery on standby and on calls compared to 11 roms
I get 3SOT compared to 5-6, hardly making it through the day,
other than that the rom is very snappy and smooth,
I didnt notice any major bugs but sometimes it feels that internet is slow even with good reception, not sure why
I agree both with heavy battery consumption on standby and internet being slow without an apparent reason.

Edit: battery drain FIXED. Please read the following replies.
 
Last edited:

kinkat1995

Member
Nov 19, 2014
14
7
Well this ROM drains battery fast so don't switch for that reason, there are many instructions all over the forum, just check first page

It seems to drain a lot of battery on standby and on calls compared to 11 roms
I get 3SOT compared to 5-6, hardly making it through the day,
other than that the rom is very snappy and smooth,
I didnt notice any major bugs but sometimes it feels that internet is slow even with good reception, not sure why

I agree both with heavy battery consumption on standby and internet being slow without an apparent reason.

Hope things will be fixed soon!
do you guys have enabled aod aka (always show time and info ) under the lock screen settings? for me phone won't go into deep sleep if it is enabled.
 
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03jack

Member
Aug 6, 2017
22
3
do you guys have enabled aod aka (always show time and info ) under the lock screen settings? for me phone won't go into deep sleep if it is enabled.
Yes, I enabled it and noticed phone does not go into deep sleep!

UPDATE: disable AOD. Battery will last very long and, in fact, the phone goes in deep sleep.
 
Last edited:
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4ny0n3

Senior Member
Aug 30, 2009
64
8
Leiria
Xiaomi 11T Pro
I've been using it for two days now and the ROM feels quite stable. I haven't had any crashes of any sort. Only problem I have is I can't record Instagram stories that last more than 15 seconds, anything further than the first story will fail to upload or download. However, that bug has been plaguing the Mi9 forever, specially when using Miui beta and not stable.

Any idea if it can be fixed?
 

takitoblop

Senior Member
Mar 19, 2012
54
3
I' m going to install it on my mi9. Now i got pixel experience, should i wipe data and install next? Or i could do a flash without wipe data.
 

[email protected]

New member
Nov 15, 2021
1
0
hello, what about
  • Wipe System , Cache, ART Cache and Data
is there a safe way to upgrade without losing data? can i use twrp recovery to restore my appa and data after upgrading?
 

duki994

Senior Member
Jan 4, 2011
795
1,577
Nis
Xiaomi Mi 9
Remarks
Pretty stable ROM.
Stable, fast and battery saving for everyday usage.
Everything works (for now). Stable network and WiFi all around. Much better on low WiFi signal than MIUI (better latencies and less battery drain).
Blazing fast. All apps work. No compatibility issues.

Capable of getting up to 7h SOT with a lot of instant messaging apps (MS Teams, Skype, FB Messenger, Insta, Telegram, Viber etc.).

4-5h SOT with medium-heavy usage including 30min gaming.

5h-6h SOT with normal usage.

Great job @lamjiidii1 !


Issues
1. AOSP dialer/caller app.
* It doesn't show in-call screen when call is made but calls work perfectly.
* Fixed by using Google Dialer app from Nik GAPPS
2. AOD causes heavier battery drain than stock MIUI
3. ANX camera doesn't work (probably lib incompatibility)
 
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MrJohnOliver

Senior Member
Jan 12, 2020
65
5
29
Marco de Canaveses
Xiaomi Mi 9
So, I just try this rom, and there is a few things missing or wrong with it.



Where is the Black Theme?

Why the finger print takes 1 min to read?

Why theres no face unlock?

Why theres no quick unlock after enter pin?



But so far the ROM is smooth, the animations don´t lag at all. It's the best ROM I have try so far (Android 12).
 
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_styx3

New member
Dec 5, 2021
2
0
Use this recovery 11.3
wipe system dalvik data and cache
flash Arrow os
Then flash firmware, I used 12.5.1.0 eea u can also use 12.5.4 china
I also formatted data partition cuz of encrypted partition on miui
Then reboot and wait 5 min to boot
Enjoy 😌
flashed like so, didnt get past MI initial screen, system doesnt boot, have tried different firmwares, flashed disableforceencrypt, etc. tried both orangefox and twrp recoveries. i just cant make it work? also downloaded arrowos from this thread and arrowos.net, different builds
 

RealNBB

Senior Member
Aug 18, 2014
148
55
flashed like so, didnt get past MI initial screen, system doesnt boot, have tried different firmwares, flashed disableforceencrypt, etc. tried both orangefox and twrp recoveries. i just cant make it work? also downloaded arrowos from this thread and arrowos.net, different builds
You have to format(!!) data after flashing ROM...
But it is all written in the 1st post.
 
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  • 23
    logo.png

    ArrowOS

    ABOUT
    ArrowOS
    is an AOSP/CAF based project started with the aim of keeping things simple, clean and neat.

    Website: https://arrowos.net
    Telegram: Channel | TG Portal/Links
    Github: https://github.com/ArrowOS
    Code Review: review.arrowos.net
    E-mail: arrowos.contact
    Blog: blog.arrowos.net

    Checkout more documentation at (maintainership/contributing): Check this out

    WHAT WORKS?
    • Almost everything
    • SELinux is enforcing
    • WiFi
    • Audio
    • RIL
    • GPS
    • Camera
    • Flashlight
    • NFC
    • Fingerprint on display
    • Vibration
    • Bluetooth
    • FM Radio
    • Cast
    • Any other thing that is not listed in the "What doesn't work" list

    WHAT DOESN'T WORK?
    • You tell me
    Be sure to include a log : check how to

    Support group

    HOW TO INSTALL
    • Reboot to recovery
    • Wipe System , Cache, ART Cache and Data
    • Flash the ROM
    • Flash firmware
    • Flash any addons (GApps if needed, Magisk...)
    • Format data if you are encrypted
    • Reboot

    HOW TO UPDATE
    • update via OTA is not available yet, but will be as mush as possible
    • Reboot to recovery
    • Flash the new ROM
    • Flash any addons that you were using previously (GApps, Magisk...)
    • Reboot

    DOWNLOADS
    Click here to Download
    Tip: choose Arrow version, choose build type: "GAPPS" or "VANILLA" to download.

    Read our blog article/post about:
    * HOW-TO report a bug
    * GAPPS and VANILLA variants
    * Checking build integrity

    ROM Source: https://github.com/ArrowOS
    Kernel Source: https://github.com/EcrosoftXiao/kernel_xiaomi_cepheus

    Donation:
    Of course, if you like this work, or you see me Did hard work and an effort worthy of thanks here my PayPal https://www.paypal.me/lamjiidii1
    Thanks in advance :)
    XDA:evDB Information
    ArrowOS 12 for cepheus, ROM for the Xiaomi Mi 9

    Contributors
    lamjiidii1
    ROM OS Version: Android 12
    ROM Kernel: Linux 4.x
    ROM Firmware Required: MIUI 12.5.0.4
    Based On: AOSP

    Version Information
    Status: Stable

    Created 2021-10-31
    Last Updated 2021-10-31
    3
    Thanks,is excellent new, I was waiting impatiently for it, some screenshots, please.
    3
    I'm confused about the title. The title said its a official stable version. When i click on download then it shows me the unofficial version. On the website when i click on Arrow-12.0 then it shows only the community experiments. So the title is a missdirection.
    3
    How often/long do you have plan to do updates/security updates?

    Thank you for answer and for your time.
    I updating the ROM every month since April!!
    3
    I have the same ... how to install?
    Use this recovery 11.3
    wipe system dalvik data and cache
    flash Arrow os
    Then flash firmware, I used 12.5.1.0 eea u can also use 12.5.4 china
    I also formatted data partition cuz of encrypted partition on miui
    Then reboot and wait 5 min to boot
    Enjoy 😌