Redmi K100 Pro Max / POCO F9 Ultra users commonly run into the phone hanging on the Fastboot screen, especially after a failed TWRP or custom recovery flash. The stock ROM below is a direct fix for this. This build is made specifically for the Qualcomm SM8850-AC Snapdragon 8 Elite Gen 5 chipset, so confirm your exact model number (e.g. 26077PC53G) before downloading.
Whether your Redmi K100 Pro Max / POCO F9 Ultra (codename: songyuan) is soft-bricked, hanging on the boot logo, or you just want to move back to stock MIUI/HyperOS after trying a custom ROM, this guide has what you need — every fastboot and recovery firmware build for this device, reliable download servers, and a full flashing walkthrough.
A quick heads-up before you scroll further: pick the fastboot ROM only if you're comfortable with a full wipe, since it resets the phone completely. If you just need to patch or repair the system without losing your data, the recovery ROM is usually the safer bet.
Device Overview
| Brand | Xiaomi |
|---|---|
| Device | Redmi K100 Pro Max / POCO F9 Ultra |
| Model Number | 26077PC53G |
| Codename | songyuan |
| Chipset | Qualcomm SM8850-AC Snapdragon 8 Elite Gen 5 |
| OS Version | HyperOS 4 / Android 17 |
| Storage Variants | 256GB / 512GB / 1TB |
| RAM Variants | 12GB / 16GB |
| Approx. Total Size | 12.1 GB |
| Recommended Tool | Mi Flash Tool |
Fastboot vs Recovery ROM — Which One Do You Need?
It's easy to grab the wrong file here, so let's keep it simple. A fastboot ROM is the full firmware set, flashed via Mi Flash Tool on a computer — it resets the device entirely, which is exactly why it works for bootloops, dead boot, or a phone stuck at the logo. A recovery ROM instead runs from the phone's own Mi Recovery menu, and is meant for updating, downgrading, or repairing software without wiping your data (backing up first is still a smart move).
🔹 Fastboot ROM
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Fastboot ROM | OS3.0.306.0.WGNMIXM | 16 | 12.1 GB | 2026-08-27 |
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Fastboot ROM | OS3.0.304.0.WGNMIXM | 16 | 12.1 GB | 2026-08-15 |
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Fastboot ROM | OS3.0.301.0.WGNMIXM | 16 | 12.0 GB | 2026-07-29 |
🔹 Recovery ROM
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Recovery ROM | OS3.0.301.0.WGNMIXM | 16 | 9.2 GB | 2026-09-01 |
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Recovery ROM | OS3.0.304.0.WGNMIXM | 16 | 9.3 GB | 2026-09-01 |
| Device Name | Codename | Type | MIUI Version | Android OS | Size | Date |
|---|---|---|---|---|---|---|
| Redmi K100 Pro Max / POCO F9 Ultra | songyuan | Recovery ROM | OS3.0.306.0.WGNMIXM | 16 | 9.3 GB | 2026-09-01 |
Tools You'll Need
Before flashing, make sure you have the flashing tool and the correct USB driver installed on your PC — most flashing failures actually come down to a missing or outdated driver rather than the firmware itself.
How to Flash Redmi K100 Pro Max / POCO F9 Ultra Using Mi Flash Tool
- Download the fastboot ROM and extract it fully — don't skip extraction, Mi Flash Tool won't read a zipped folder.
- Install Mi Flash Tool from the link above and open it.
- Power off the phone, then hold Volume Down + Power together to boot into Fastboot mode.
- Connect the phone to your PC using a good-quality USB cable — cheap cables are a common cause of connection drops mid-flash.
- In Mi Flash Tool, click "Select" and point it to the extracted firmware folder.
- Once the COM port is detected, hit "Flash" and let it run — don't disconnect the phone during this step.
- The phone will reboot on its own once flashing finishes. First boot can take a few minutes longer than usual, so give it time.
Common Flashing Errors and How to Fix Them
"Auth file needed" — this usually shows up when the connected Mi account isn't authorized for flashing. You'll need an authorized account, or a test-point based flash for unlocked devices.
"COM port not detected" — almost always a driver issue. Install the Qualcomm/MediaTek USB driver from the link above, then put the phone back into EDL or Fastboot mode and try again.
"Flashing failed" partway through — try a different USB cable or port first; if that doesn't help, re-extract the firmware in case a file got corrupted during download.
Frequently Asked Questions
Is this firmware official?
Yes, these are unmodified stock builds pulled directly from Xiaomi's own update servers.
Will flashing delete my data?
Fastboot flashing wipes the device, so back up anything important first. Recovery flashing is less destructive but a backup is still a good idea.
My model number doesn't match exactly — can I still use this?
Stick to the exact codename (songyuan) shown in the table above. Flashing firmware built for a different region or variant can leave the device unusable.
0 Comments
Write Your Problem in the Below Comment Box