The ZTE Libero S10 (model 901ZT) is a budget-friendly smartphone released for the Japanese market, primarily on the SoftBank carrier network. It offers a compact 5.7-inch Full HD+ display and reliable performance for everyday tasks, powered by a Qualcomm Snapdragon processor. This guide provides the official stock ROM for the Libero S10, a low-level QFIL / EDL unbrick package that is essential for fixing a hard-bricked phone, resolving persistent software errors, or bypassing a Google FRP lock.
Important: This is an advanced unbricking procedure. This firmware is specifically for the ZTE Libero S10 (901ZT) Japanese SoftBank variant. Flashing this file on any other model or regional variant will almost certainly cause a hard brick. The process will erase all data.
Quick Device Specs
- Device: ZTE Libero S10 (901ZT)
- Release year: 2019
- Chipset: Qualcomm Snapdragon 632
- Display: 5.7″ TFT, Full HD+
- Battery: 3100 mAh
- Original OS: Android 9 Pie (Firmware provided is an update to Android 12)
Required Downloads
To flash a Qualcomm device in EDL mode, you will need the specific QPST suite and drivers.
| File / Tool | Download Link |
|---|---|
| QPST & QFIL Flash Tool | Download Latest Version |
| Qualcomm QDLoader USB Drivers | Download Drivers |
Unbrick Firmware (QFIL)
| Region / Carrier | Build | Android | Type | Download | Chipset |
|---|---|---|---|---|---|
| Japan (SoftBank) | V1.0.0B12 | 12.0 | QFIL EDL Unbrick ROM | Download | Qualcomm |
How to Flash (QFIL EDL Method)
This method is for restoring a hard-bricked device and will erase all data.
- Install Drivers: Download and extract the Qualcomm QDLoader USB Drivers. Run the installer. You may need to disable Driver Signature Enforcement in Windows for the drivers to install correctly.
- Install & Launch QPST: Install the QPST suite, which includes the QFIL application. Launch QFIL from your Start Menu.
- Enter EDL Mode: This is the most critical step. Power off the device completely. Connect a USB cable to your PC. Now, press and hold both Volume Up and Volume Down buttons on your phone, and while holding them, plug the other end of the USB cable into the phone. The screen will remain black, but your PC should recognize the device.
- In QFIL, the text at the top of the window should change from “No Port Available” to “Qualcomm HS-USB QDLoader 9008”. If it does, you are in EDL mode.
- Configure QFIL:
- Ensure “Select Build Type” is set to Flat Build.
- Click “Browse” next to “Programmer Path” and select the prog_emmc_firehose_… file from the extracted firmware folder.
- Click “Load XML” and select the rawprogram_unsparse.xml file, and then the patch0.xml file when prompted.
- Begin Flashing: Click the blue “Download” button. The process will begin, and you will see the progress in the status bar.
- Finish: The process will take several minutes. Once it completes successfully, you will see a “Download Succeeded” message. You can now disconnect your phone and hold the Power button to boot it up. The first boot will take significantly longer than usual.
Device-Specific Troubleshooting for ZTE Libero S10 (901ZT)
- “No Port Available” / Driver Issues: This is the most common problem. If QFIL doesn’t see the “Qualcomm HS-USB QDLoader 9008” port, your drivers are not installed correctly. You must disable Driver Signature Enforcement in Windows before running the driver installer. Reboot your PC after installation and try again.
- Entering EDL Mode: Ensure the phone is completely powered off. Press and hold both Volume Up and Volume Down buttons simultaneously. While holding them, plug the USB cable into the phone. The screen will stay black, but your PC should make a connection sound, and the port will appear in QFIL.
- QFIL “Sahara” or “Firehose” Error: This error points to a communication failure. Use a high-quality USB cable, connect directly to a USB 2.0 port on your computer’s motherboard (the back ports on a desktop), and ensure no other conflicting mobile drivers are installed.
- Japan Carrier ROM: Please be aware that this is official firmware for the Japanese SoftBank carrier. After flashing, your device will be restored to this specific software, which will include carrier-specific applications and settings. The default language may be Japanese.
FAQs
Q1. What is a QFIL / EDL firmware? QFIL (Qualcomm Flash Image Loader) is a tool used to flash firmware in EDL (Emergency Download) mode. This is a very low-level mode, a step below fastboot, designed to recover Qualcomm devices from a “hard brick” state where they are otherwise unresponsive.
Q2. Will this unlock my phone from the SoftBank network? No. Flashing the stock firmware restores the phone’s original software, but it does not remove the SIM/network lock put in place by the carrier.
Q3. My phone is not from Japan. Can I use this ROM? It is strongly recommended not to. This firmware is built specifically for the Japanese (901ZT) model. Flashing it on a different regional variant can cause modem/baseband issues (leading to no network signal) or a hard brick.
