The Xiaomi Redmi Note 4X / Note 4 Snapdragon (codename mido), launched in 2017, is an absolute legend in the world of budget smartphones. It became a phenomenal bestseller by perfecting the formula for an affordable workhorse, combining the incredibly power-efficient Qualcomm Snapdragon 625 chipset with a massive 4100 mAh battery. This pairing earned it the title of “battery king” and a reputation for unparalleled endurance. Its premium metal build and reliable performance made it a massive success and a favorite in the custom ROM community. For owners of this iconic device, this page provides official fastboot ROMs, the popular Xiaomi.eu custom ROM, and two versions of TWRP recovery.
Important: This guide and these files are ONLY for the Snapdragon version of the Redmi Note 4/4X, codenamed mido. They are NOT compatible with the older MediaTek version (codename nikel). Flashing the wrong firmware will permanently brick your phone.
Quick Device Specs
- Device: Xiaomi Redmi Note 4X / Note 4 (Snapdragon) (mido)
- Release year: 2017
- Chipset: Qualcomm Snapdragon 625
- Display: 5.5″ IPS LCD
- Battery: 4100 mAh
- Original MIUI: Android 6.0 (Marshmallow), MIUI 8
Required Downloads
| File / Tool | Download Link |
|---|---|
| Xiaomi Mi Flash Tool | Download Latest Version |
| Xiaomi USB Drivers | Included with Mi Flash Tool |
| Bootloader Unlock Tool | Official Mi Unlock Page |
Official & Custom ROMs / Recovery
| Region | Build | Android | Type | Download | Codename |
|---|---|---|---|---|---|
| China | V11.0.2.0.NCFCNXM | 7.0 | Official Fastboot ROM | Download | mido |
| Global | V11.0.2.0.NCFMIXM | 7.0 | Official Fastboot ROM | Download | mido |
| Xiaomi.eu (Custom) | V10.2.2.0.NCFCNXM (Based) | 7.0 | Custom Recovery ROM | Download | mido |
| TWRP (Official) | 3.7.0_9-0 | — | Custom Recovery | Download | mido |
| TWRP (wzsx150 Build) | 3.3.0 | — | Custom Recovery | Download | mido |
How to Flash Official ROM (Mi Flash Tool)
Use this method to unbrick your phone or restore official MIUI firmware.
- Boot into Fastboot mode (Power + Volume Down).
- Extract the official firmware (.tgz file) and select the main folder containing the
/imagesdirectory in Mi Flash Tool. - Select clean all for a safe installation (you can use clean all and lock to return to a fully stock, locked state).
How to Install TWRP & Flash Custom ROMs
Use this method to install the Xiaomi.eu custom ROM or other community-developed ROMs.
What is TWRP? TWRP (Team Win Recovery Project) is a powerful custom recovery that replaces your phone’s limited stock recovery. For a legendary device like the Redmi Note 4X with a massive developer community, TWRP is the gateway to years of continued updates via custom ROMs, as well as enabling backups and root access.
Disclaimer: This is an advanced process. Proceed at your own risk.
- Unlock the Bootloader: This is a mandatory first step. Use the official Mi Unlock Tool.
- Flash TWRP:
- Boot your phone into Fastboot mode (Power + Volume Down) and connect it to your PC.
- Using ADB & Fastboot tools on your PC, flash your preferred TWRP
.imgfile with the command:
fastboot flash recovery twrp-filename.img
- Boot into TWRP: After flashing, immediately boot into recovery by holding Power + Volume Up.
- Install Custom ROM:
- In TWRP, perform a full wipe (Wipe > Advanced Wipe > select Dalvik, Cache, System, Data).
- Transfer the Xiaomi.eu .zip ROM file to your phone.
- In TWRP, tap “Install,” select the .zip file, and swipe to confirm the flash.
- Reboot your system once complete.
FAQs
Q1. How do I know if I have the Snapdragon (mido) or MediaTek (nikel) version?
This is the most critical question. The easiest way is to install a CPU info app (like AIDA64) from the Play Store; it will show “Qualcomm” for mido and “MediaTek” for nikel. You can also check the original box, which will specify the processor. The firmwares are not compatible.
Q2. What made the Redmi Note 4X so popular?
It was the perfect combination of price, performance, and battery life. The Snapdragon 625 was incredibly efficient, and when paired with a 4100 mAh battery, the phone could easily last two days, making it an “endurance king.”
Q3. What was the final official update for the Redmi Note 4X?
The device launched with Android 6.0 Marshmallow and received its final major OS upgrade to Android 7.0 Nougat. The MIUI 11 builds provided here are the last official software updates for this model.
Q4. Why are there two TWRP links? Which one should I use?
The table lists both the Official TWRP from the main project website (twrp.me) and a popular third-party build. For most users, the Official build is the recommended starting point. Different builds can sometimes offer better compatibility with specific custom ROMs, which is why alternatives exist in the community.
Troubleshooting
- Pre-flashing Checklist:
- Have you backed up all important data from your phone?
- Is your phone’s battery charged to at least 50%?
- Have you confirmed your device is the mido (Snapdragon) variant?
- Common Flashing Errors:
- “error: not catch checkpoint” or “Flash system error” → This almost always means you have selected the wrong folder in Mi Flash Tool. Make sure you have selected the main folder that contains the images sub-folder, not the sub-folder itself.
- Device is not detected in Fastboot → Ensure drivers are correctly installed. Try a different USB port and a high-quality data cable. Run Mi Flash Tool as an administrator.
- TWRP Issues:
- TWRP asks for a password → This means your phone’s storage is encrypted. The standard fix is to go to the “Wipe” menu in TWRP and choose “Format Data”. This will erase everything on your internal storage.
- Stuck on boot after flashing → If the phone doesn’t boot up after flashing a custom ROM, reboot to TWRP, perform a full wipe (Cache, Dalvik, System, Data), and then re-flash the ROM .zip file.
