QMobile Smart S4001Q
QMobile Smart S4001Q is a Qmobile firmware file listed under Qmobile, distributed as QMobile_Smart_S4001Q_SC7731e_20180806_8.1.0_SPD.zip with a download size of 859 MB. It is built for the Unisoc (Spreadtrum) SC7731E chipset and runs Android 8.1 (Oreo), with a firmware build date of August 06, 2018. It is flashed with SPD ResearchDownload (or UpgradeDownload). It was published on April 28, 2026. This page has been viewed 25 times. It is available to download free of charge. Before flashing, verify the file matches your exact device model and back up your data.
About QMobile Smart S4001Q
QMobile Smart S4001Q Stock Firmware (Flash File) The Flash File will help you Upgrade, Downgrade, or re-install the Stock Firmware (OS) on your Mobile Device. In addition, the Flash File (ROM) also enables you to repair the Mobile device if facing any Software Issue, Bootloop Issue, IMEI Issue, or Dead Issue. File Name: QMobile_Smart_S4001Q_SC7731e_20180806_8.1.0_SPD.zip File Size: 859 MB Flash Tool: SPD Flash Tool How to Flash (install): Follow Tutorial (Mediafire)
File Details
| File name | QMobile Smart S4001Q |
|---|---|
| Package | QMobile_Smart_S4001Q_SC7731e_20180806_8.1.0_SPD.zip |
| Brand / Platform | Qmobile |
| Category | Qmobile |
| Chipset | Unisoc (Spreadtrum) SC7731E |
| Android version | Android 8.1 (Oreo) |
| Build date | August 06, 2018 |
| Flash tool | SPD ResearchDownload (or UpgradeDownload) |
| Package format | ZIP archive |
| File size | 859 MB |
| Date added | April 28, 2026 |
| Price | Free |
How to flash QMobile Smart S4001Q with SPD ResearchDownload
- Confirm QMobile Smart S4001Q matches your exact device model and that the phone uses the SC7731E chipset.
- Back up your personal data, as flashing firmware can erase the device. Charge the battery above 50%.
- Download the file (859 MB) using the button above and extract it on a Windows PC.
- Install the SPD / Unisoc USB drivers, then open SPD ResearchDownload (or UpgradeDownload).
- In the tool, load the .pac firmware file from the extracted folder.
- Start the flash, then press Start in the tool, then connect the powered-off phone while holding Volume Down (boot key).
- Wait for the success message before disconnecting. Leave "Erase NV" unticked unless you intend to wipe IMEI and calibration data.
Guides for this firmware
- Flashing .pac Files with SPD ResearchDownload GuideSPD ResearchDownload (also known as UpgradeDownload) is a specialized flashing tool used to install stock firmware on devices powered by Unisoc (Spreadtrum) chipsets. It is primarily used to unbrick…
- How to Use SPD ResearchDownload: Firmware Flashing GuideSPD ResearchDownload (also known as UpgradeDownload) is a specialized flashing tool used to install stock firmware on devices powered by Unisoc (Spreadtrum) chipsets. It allows technicians and users…
Frequently asked questions
Is QMobile Smart S4001Q free to download?
Yes, QMobile Smart S4001Q can be downloaded free of charge from this page.
How large is the download?
The QMobile Smart S4001Q package is 859 MB.
Which tool do I need to flash QMobile Smart S4001Q?
QMobile Smart S4001Q is Unisoc (Spreadtrum) SC7731E firmware, so it is flashed with SPD ResearchDownload (or UpgradeDownload) using the .pac firmware file.
What Android version is QMobile Smart S4001Q?
This firmware is Android 8.1 (Oreo), built on August 06, 2018.
Which devices is this firmware for?
This file is intended for Qmobile devices. Always confirm it matches your specific model before flashing.