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[ROM][CAF][Android 10][OFFICIAL] Cosmic-OS v5.0 - Quasar[BERYLLIUM][08/01/2020]

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Senior Member
Nov 10, 2015
I just flashed the ROM.. Airtel signal strength is very low.... otherwise the ROM is solid one


Senior Member
Feb 24, 2012
I did try it and it would not boot up ?

try flash it back to lastest miui.
always do a clean flash.
flash vendor
flash Modem
flash rom
flash Gapps.

then wipe the cache and dalvik.
the 1st boot might not boot it to the home screen (as i am not ever successful).
the just hold the power button to reset. it will take few minutes and i manage to boot it to the home screen.

if you want to flash magisk, etc. flash it after youget to the home screen.


Senior Member
Jun 21, 2012
Xiaomi Poco F1
hey @abhijiths362 in the OP, the "Official Builds" link is linking to the first build. Why not link to the folder where build are saved? If you want to link to the latest, then you will have to update the link everytime =/


Aug 2, 2016
One bug I found is that when I go to advanced WiFi settings, the settings app closes not allowing me to connect.


Senior Member
Jun 21, 2012
Xiaomi Poco F1
I mean when I go to the advanced settings and press connect it closes of crashes.
Clean flash and followed the steps with bitgapps but I didn't install q firmware as I cannot find the link for it

well, firmware flashing is optional, as stated in OP. But if you want the latest one, you can find it here.

About the wifi issue, I'm not really sure I understand the issue. As I said, I'm able to access each wifi screen. I took some screenshots and have put it in this dropbox folder. Notice that I had wifi already set up, then I choose to forget it and then I connected to it again. Try to take some screenshots too, so we'll be able to see where it's happening.

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     * Your warranty is now void.
     * I am not responsible for bricked devices, dead SD cards,
     * thermonuclear war, or you getting fired because the alarm app failed. Please
     * do some research if you have any concerns about features included in this ROM
     * before flashing it! YOU are choosing to make these modifications, and if
     * you point the finger at me for messing up your device, I will laugh at you.


    Cosmic-OS is a pure CAF based custom ROM with focus on performance, stability and battery life with feature additions.

    Based on Android 10 with CAF Tag - LA.UM.8.11.r1-01900-NICOBAR.0
    # Customizations:

    - Based on CAF tag LA.UM.8.11.r1-01900-NICOBAR.0.
    - Our custom adaptive icons for all the apps.
    - ThemePicker app shipped with the ROM for basic system ui customisations.
    - Battery stats and management feature.
    - Support for showing current and new version in package installer during apk installation.
    - Support to allow skipping back swipe gesture on top half or top smaller area of the screen.
    - Support for allowing user. to add/remove QS tile with one click
    - Removed the annoying build number display in the QS panel.
    - Support for asking pin on secure lockscreen for sensitive tiles.
    - Support to allow setting QS panel columns and Rows.
    - Support for QS Tile title visibility changes.
    - Support for Quick QS Pulldown.
    - Fixed and improved the screenrecorder and added red dot, quality settings, etc customisations for the same.
    - Support for displaying statusbar BT battery level.
    - Support for Google Sans font family in Font settings
    And many more being added regulary!


    Instructions for flashing:
    Download ROM, GApps and Q-Vendor .
    Wipe /data, /system and /cache.
    Flash Vendor
    Flash Q-Firmware (optional)
    Flash ROM and GApps (BitGapps recommended)(And any mods you use)
    Enjoy :p

    NOTE for maintainer: If it stucks at bootanimation , hard reboot will fix the issue.

    Instructions for update:
    Download ROM and GApps.
    Copy ROM and GApps to internal storage.
    Flash ROM and GApps (And any mods you use)

    Note: First boot and boots after every update can take some time. They may even loop a few times. We do not support custom kernels or mods like MultiROM. If you have an issue, make sure your edits aren't interfering with the issue you're reporting.


    Official Builds | BiTGApps

    XDA:DevDB Information
    Cosmic-OS, ROM for the Xiaomi Poco F1

    Source Code: https://github.com/Cosmic-OS

    ROM OS Version: Android 10
    ROM Kernel: Linux 4.x
    ROM Firmware Required: Special Caf Q vendor needed
    Based On: CAF

    Version Information
    Status: Stable
    Current Stable Version: 5.0
    Stable Release Date: 2020-01-08

    Created 2020-01-08
    Last Updated 2020-01-09
    New build is up!!!

    -Merged CAF tag LA.UM.8.11.r1-02200-NICOBAR.0 to source.
    -Fixed Gapps not booting issue (working with nikgapps)
    -Fixed message notification not receiving issue
    -For more changes:https://github.com/Cosmic-OS

    Link over downloaded.... Please up new link​

    New build soon​

    -Thermal profiles included in the Q-vendor
    -Hard reboot if stuck in bootanimation
    -Based on NICOBAR caf tag
    -Join our support chat for device specific issues:https://t.me/xberyllium
    -Download Q-Firmware : https://drive.google.com/open?id=1dMPgHSLZv4bWAxbHwbhF1nCMTLlDcJH6