Before you flash: Flashing firmware will erase all data on your device. Back up contacts, photos, and apps before proceeding. FlashGuideHub is not responsible for any damage caused by following this guide.
About the Lenovo Tab 4 8
The Lenovo Tab 4 8 is a budget 8-inch Android tablet released in September 2017, powered by the Qualcomm Snapdragon 425 (APQ8017 on TB-8504F, MSM8917 on TB-8504X; TB-8504L unconfirmed exact part) chipset. Lenovo distributed it across three model numbers with firmware on file, each targeting a different radio configuration or region.
Each model carries its own chipset variant and, on TB-8504F, several regional build tags. The Prerequisites and Firmware Package sections below explain how to identify your exact model and region before you begin.
Which Flash Mode Should You Use?
QFIL (EDL / 9008 Mode)
The standard method for all builds on file. Writes over Qualcomm's EDL interface, which works regardless of bootloader lock state. Requires the tablet to be in EDL (9008) mode and the correct programmer/XML files from the matched package. Erases all user data on a full download.
QPST Download Tool
An alternative to QFIL for the packages labeled "_QPST" in their filename. Same underlying EDL flashing approach, different tool workflow. Erases all user data.
SP Flash Tool (Not Applicable)
SP Flash Tool and MediaTek scatter-file flashing are specific to MediaTek chipsets and do not apply to the Lenovo Tab 4 8, which uses a Qualcomm Snapdragon 425 SoC. Some third-party firmware directories incorrectly list SP Flash Tool for this device — do not follow those instructions.
What You Need Before Flashing
QFIL and QPST officially run on Windows. Install the Qualcomm HS-USB QDLoader 9008 drivers before connecting the tablet.
Download the package that matches your exact model number (TB-8504F/L/X) and, where a tag is present, your region. Confirm in Settings → About tablet → Model Number.
QFIL/QPST EDL flashing operates below the Android bootloader, so no unlock step is required for stock-firmware flashing on this device.
A data-capable USB cable is essential. Connect directly to a USB 2.0 port rather than a hub for a more stable EDL session.
A flash takes several minutes. This tablet has a non-removable battery, so a power interruption mid-flash carries real risk — charge to at least 30% first and keep the tablet plugged in throughout.
A full QFIL/QPST download wipes user data. Back up photos, accounts, and any local files to a PC or cloud storage before beginning.
How to Flash the Lenovo Tab 4 8 — Quick Overview
A fast reference for flashing the Lenovo Tab 4 8 (Snapdragon 425) using QFIL. For the complete walkthrough with images and error troubleshooting, see the full guide.
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Identify your exact model number and package type
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Install the Qualcomm USB drivers and QFIL or QPST
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Download the firmware package matching your model + region
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Boot the tablet into EDL (9008) mode
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Load the package and flash with QFIL (or QPST)
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Wait for completion, then boot
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Confirm the device boots and check basic function
Finding the Firmware Package for
This device is not applicable to scatter-file-based flashing. Lenovo distributes Tab 4 8 firmware as Qualcomm EDL packages — either a "_QDL" or "_QPST" labeled archive — containing the programmer and image files QFIL or QPST need. After extracting the archive, point QFIL/QPST at the extracted folder rather than the compressed archive itself.
rawprogram0.xml + patch0.xml (loaded via QFIL's Load XML button, alongside the prog_emmc_firehose .mbn programmer inside the extracted archive)
Lenovo Tab 4 8 packages extract to a folder containing the programmer/rawprogram-style files QFIL or QPST need — exact internal filenames vary by package. Fully extract the archive to a folder on your PC before doing anything else — do not point either tool at a compressed archive.
The Lenovo Tab 4 8 has three hardware variants: TB-8504F (Wi-Fi only, APQ8017), TB-8504L (LTE), and TB-8504X (LTE, MSM8917). A fourth model, TB-8504N, shows up on some device-database sites, but there's no firmware file for it here.
Always match both the model number and the region tag on the file — TB-8504F alone has six builds spanning ROW, UK/GB, and two tags (SCP, HFT) whose exact region isn't clear, so match by the tag shown on your device rather than guessing.
All builds here use Qualcomm's EDL (9008) flashing path via QFIL or QPST — some other sites wrongly list MediaTek SP Flash Tool for this device, but that doesn't apply here.
Lenovo Tab 4 8 Firmware Versions
A representative build for each confirmed model number of the Lenovo Tab 4 8. Always verify the model number matches your device before flashing.
| Version | Region | Android Version | Size | MD5 | Download |
|---|---|---|---|---|---|
S001019 |
TB-8504F — ROW (Rest of World) | Android 7.0 | 2.50 GB | — | ⬇️ Download |
S000022 |
TB-8504L — only build on file (no regional tag) | Android 7.0 | 3.0 GB | — | ⬇️ Download |
S001031 |
TB-8504X — ROW (Rest of World) | Android 7.0 | 2.36 GB | — | ⬇️ Download |
This device has 9 known files across three confirmed model numbers (TB-8504F, TB-8504L, TB-8504X). See the complete archive on AndroidFirmwareFile.com →
Lenovo Tab 4 8 — Important Notes
The Lenovo Tab 4 8 launched on Android 7.0 Nougat in September 2017. Some units were later updated to Android 7.1.1 or 8.1 via OTA — check Settings → About tablet on your own device to see what you're currently running, since the builds below are listed as Android 7.0 (the launch baseline), not necessarily what's installed on your unit right now.
Because this is a non-removable-battery device, an interrupted EDL flash cannot be recovered with a battery pull the way some older removable-battery devices can — keep the USB cable connected throughout, and prefer a directly-wired USB 2.0 port over a hub or unpowered dock.
Common Errors on the Lenovo Tab 4 8
QFIL: "Sahara Fail: Transmitted Size is not equal to Image size" or download stalls early
Usually a driver, cable, or mismatched-package issue. Confirm the Qualcomm HS-USB QDLoader 9008 driver is installed and visible in Device Manager the moment the tablet enters EDL mode, use a known-good data cable on a USB 2.0 port directly on the motherboard (not a hub), and confirm the programmer/XML files you selected came from the same extracted package rather than mixed from two different downloads.
QFIL does not detect the device / no COM port appears
Confirm the tablet is actually in EDL (9008) mode — a normal fastboot or recovery screen will not be detected by QFIL. Reissue `adb reboot edl` if the device still boots, or double-check whatever test-point/service method you used to force EDL mode. Reinstall the Qualcomm USB drivers if the port still does not appear.
QPST: "Download Fail: NV backup/restore error" or similar NV/EFS warning
This can appear when flashing over a device with different NV/EFS calibration data (e.g. a different regional build than what shipped). It is frequently a non-fatal warning on a Wi-Fi-only or generic ROW package, but if IMEI or network calibration matters to you, prefer the QDL/QPST package matching your unit's original region rather than a mismatched one.
Device stuck on Lenovo boot logo after flashing
A failed or interrupted EDL write leaves one or more partitions inconsistent. Reboot back into EDL mode and re-run the full QFIL/QPST download from scratch using the same package rather than trying to patch just one partition.
No Wi-Fi / no mobile signal after flashing (TB-8504X/TB-8504L)
Usually caused by flashing a region-mismatched package. Re-flash using the package matching your exact model number and, where possible, your unit's original regional tag from the firmware table below.
For the full Qualcomm EDL error database: QFIL / EDL Error Directory →
Frequently Asked Questions — Lenovo Tab 4 8
No — it is a Qualcomm Snapdragon 425 device (APQ8017 on TB-8504F, MSM8917 on TB-8504X). SP Flash Tool is MediaTek-specific and does not apply here; some third-party firmware directories carry incorrect boilerplate claiming otherwise. Use QFIL or QPST instead.
No. QFIL and QPST both flash over Qualcomm's EDL (Emergency Download / 9008) interface, which operates below the Android bootloader and works regardless of bootloader lock state.
TB-8504F is the Wi-Fi-only model (Qualcomm APQ8017). TB-8504X is the LTE model (Qualcomm MSM8917). TB-8504L is an LTE model too, but treat it as its own model and match firmware to it by model number — don't assume it's identical to TB-8504X.
They look like regional or carrier project codes, but their exact meaning isn't clear. If your unit's own build tag matches one of these, that file is the closer match; otherwise the ROW (Rest of World) build is the safest generic starting point.
The representative builds below are one per confirmed model number, not the full inventory. See the complete archive link below for all 9 known files.
Ready to Flash?
Follow the full step-by-step QFIL guide with interactive progress tracking, prerequisite checklist, and complete troubleshooting.