Part of POCO guides, DerpFest guides, 2025 guides.

So you want Matrixx OS on the POCO X7 Pro. Good news first: this one is short, and the build behind it is a signed userdebug Gapps build with SELinux enforcing. That sounds like paperwork, but it is the reason this ROM behaves like a daily driver instead of an experiment you reboot every hour.

Bad news is one step. There is a real brick trap in the flashing guide for this device, and it hides inside a command that looks completely normal.

What you need before you start

• An unlocked bootloader on the POCO X7 Pro (rodin).
• The Matrixx OS ROM zip, the vendor file for this device, and the vendor_boot image.
• ADB and fastboot on your PC, plus a USB driver that Windows is actually happy with.
• The KSU patched image, only if you want root.
• A cable you trust and a battery above 50%.

Do not skip the vendor file. It is not optional decoration.

Step 1 - push vendor_boot to both slots

Boot the phone into fastboot, plug it in, and check the PC sees it:

fastboot devices

You want a serial number back. An empty line means the driver is wrong, not the phone, so fix that before you touch anything else. Then flash:

fastboot flash vendor_boot --slot=all vendor_boot.img

Both slots, one command. That part is fine.

Step 2 - reboot by hand, this is the trap

Do not type fastboot reboot recovery on this device. It can brick the phone. I am not being dramatic; this is the single command the flashing guide warns about, and it is easy to run by habit.

Instead run a plain reboot:

fastboot reboot

The second the screen goes dark, hold Volume Up yourself and keep holding until recovery appears. It feels clumsy. It is still the correct way here.

Step 3 - format data, then sideload

In recovery, format data first. This wipes internal storage, so if your photos are still on the phone, stop now and move them off.

Then pick Apply update, then Apply from ADB, and sideload the ROM zip:

adb sideload <rom zip>

The progress readout on the phone can sit on one number for a long time. That is normal. When it asks you to confirm, choose yes, and let it fall back to recovery.

Step 4 - optional extras, then leave it alone

Want Google apps on top, or root? This is the window. Flash the Gapps package or the KSU patched image while you are still in recovery, before the system ever boots.

Then reboot to system and walk away. First boot on a build like this takes longer than a stock phone would, and staring at it does not speed it up.

Where people get stuck

• Running fastboot reboot recovery. This is the one that costs people a phone. Hold Volume Up instead.
• Formatting data after sideloading instead of before. Wrong order usually ends in a boot loop and a second attempt.
• Changing the Reality Display Engine setting. There is a known issue with it on this build. Leave that setting exactly where it is.

One honest note

Sideload is the slow part and nobody warns you. A large ROM zip takes a while to scan through recovery, and the on-screen progress does a poor job of proving anything is happening. Keep the phone plugged in and let it finish.

If the PC side is the part that annoys you, the free Rom Flasher tool handles the ADB and fastboot driver setup without you hunting through Device Manager.

Full description from the video

Matrixx OS on the POCO X7 Pro (rodin) — a full Android 16 install walkthrough plus a quick tour of what the ROM actually feels like once it boots.

I flashed this on the X7 Pro and walked through the whole process on camera: fastboot, vendor_boot, sideload, first boot. It's a signed userdebug Gapps build with SELinux enforcing, so it behaves far more like a daily driver than a random experiment. The UI sits close to AOSP with Matrixx touches on top, and nothing crashed on me during the tour.

One thing you need to know before you start: the flashing guide for this device has a real trap in it. If you run fastboot reboot recovery, you can brick the phone. Instead you reboot and hold volume up by hand to land in recovery. I show the exact commands in the video so you don't have to guess.

📱 Device : POCO X7 Pro (rodin)

🧩 ROM : Matrixx OS (Unofficial)

🤖 Android : 16

📦 Build : Signed Userdebug · Gapps

👤 Credits : @rthedream · @ayushap1030 · @katajaree and @sleepingboys15

🛠️ What You Need

• Unlocked bootloader on the POCO X7 Pro
• adb and fastboot tool installed on your PC
• The correct USB driver
• The Matrixx OS ROM zip and the vendor_boot image
• Optional: the KSU patched image if you want root

📝 Steps

1. Download vendor_boot.img and boot the phone into fastboot.
2. Run fastboot flash vendor_boot --slot=all, then fastboot reboot.
3. As soon as it reboots, hold volume up to land in recovery. Do not use fastboot reboot recovery.
4. Format data, then sideload the ROM zip.
5. Choose yes when it asks, and let it boot back to recovery.
6. Flash Gapps or Magisk if you want them, then reboot the system.

📝 Notes and Changelog

• SELinux is enforcing.
• Gapps build, signed userdebug build.
• Known issue: don't change the Reality Display Engine setting. Leave it where it is.
• Changelog: sync last source (https://github.com/ProjectMatrixx)

Common questions

More for POCO X7 Pro