The Eken W70 tablet, featuring the VIA WonderMedia WM8850 processor, was a popular budget Android device that often requires a firmware refresh to fix boot loops or software sluggishness. This guide provides a comprehensive overview of how to find and install the correct firmware for your V20-series build. Understanding the Eken W70 WM8850 (V20)
The Eken W70 is a 7-inch capacitive touchscreen tablet powered by the WonderMedia WM8850 (Cortex-A9) CPU. While reliable for its time, the Android 4.0/4.1 environment can become corrupted. To restore it, you need a firmware package specifically compatible with the V20 build, often labeled in the system settings or on the device's boot screen. Critical Firmware Download Links
Finding working links for legacy devices can be difficult. Below are the most reliable archives and community sources for the WM8850-MID firmware:
W70-1.5.0 Build: Often archived as W70-1.5.1680-WIN8-1108.zip. You can check for legacy uploads on Android Tablet Forum or Early Bird Club.
Universal Uberoid Firmware: A popular custom ROM that often fixes driver issues for Eken clones. Check the TechKnow archives for "Universal Uberoid WM8850" packages.
RootBurner Tools: For users specifically looking to gain root access or perform a light refresh, CNX Software maintains historical links for Build Number v0.9.5 and above. How to Flash Your Eken W70
The flashing process for WM8850 devices is "SD-card based," meaning you do not need complex PC software.
Prepare the SD Card: Format a MicroSD card (8GB or less is best) to FAT32.
Extract Firmware: Download your .rar or .zip firmware package. Inside, you must find a folder named FirmwareInstall and a file named wmt_scriptcmd.
Copy Files: Place the FirmwareInstall folder and wmt_scriptcmd file directly onto the root of the SD card.
Configure (Optional): If the firmware is a multi-device pack, open the FirmwareInstall/config folder. Ensure the correct model (e.g., MID7_8233_FT5306) has a + sign in front of it and others do not. Execute the Flash: Turn off the tablet completely. Insert the MicroSD card.
Power on the device. It should automatically detect the files and display a progress bar.
Reboot: Once the screen says "Please remove SD Card," pull the card out. The tablet will reboot into the fresh OS. Troubleshooting Tips
Tablet won't start flashing: Ensure the SD card is FAT32. Some tablets are picky and require a card smaller than 4GB.
Touchscreen not working: This usually means you flashed the wrong "config" file. You must re-flash with the correct .fwc file selected in the config folder.
Boot Loop: If the device hangs on the logo, try the Uberoid custom firmware, which has better driver compatibility for various Eken W70 screen variants.
Are you looking to root your device after the firmware install, or are you trying to recover a bricked tablet?
(v2.0) is an early Android tablet featuring the WonderMedia WM8850 processor, and its firmware is primarily designed to automated system recovery and rooting capabilities via a microSD card Key Feature: Automated Script-Based Installation
The defining feature of the Eken W70 WM8850 firmware is its "boot-to-install" mechanism. Unlike modern devices that use complex recovery menus, this firmware utilizes a specific file structure to automate the update process: Self-Installing via SD : By placing a wmt_scriptcmd script and a FirmwareInstall
directory onto a microSD card, the tablet automatically detects and initiates the firmware update upon rebooting. Built-in Rooting
: Many community-provided firmware links for this specific model (such as the W70-1.1.0 version) are pre-rooted, allowing users to gain administrative access to the Android OS immediately after the installation finishes. Dual Theme Support
: The firmware often includes a "Windows 8 style" home screen as a pre-loaded alternative, allowing users to switch between a classic Android interface and a tile-based UI via a button in the taskbar. Technical Context
: VIA WonderMedia WM8850 (ARM Cortex-A9 single-core up to 1.2GHz) with a Mali-400 GPU. Original OS : Android 4.0.3 (Ice Cream Sandwich). Common Use Case
: Firmware updates for this device are typically sought to fix common hardware-related software bugs, such as the "crazy touchscreen" issue that occurs when the device is connected to certain power supplies. For a detailed guide on the flashing process, experts from CNX Software
provide a walkthrough of the file structure required for the WM8850-MID.
Is there a firmware fix for Eken 7 Tablets? - Android Central Forum
(specifically the board) featuring the Wondermedia WM8850 chipset, finding official firmware today is challenging as original manufacturer links are often dead. However, specialized tech archives still host the necessary files. Firmware Identification & Compatibility : Eken W70 / WM8850-MID. Board Version : V20 (printed on the PCB). Target Firmware
(often dated 2012-08-15) is generally the most stable and compatible version for the W70 series. Download Resources
Because the official Eken support site is no longer active, you should look for the archive file W70-1.1.0–2012-08-15.rar CNX Software Archive
: Offers detailed documentation and historically hosted alternative links for WM8850-MID Tablet Firmware Android Central Community eken+w70+v20+wm8850+firmware+link
: Discussion threads often contain mirrored links or user-uploaded fixes for Eken 7" tablets Installation Procedure Prepare a Micro SD Card : Ensure it is formatted to FAT32. Extract Files : Uncompress the file. Copy the wmt_scriptcmd script and the FirmwareInstall directory directly to the root of the SD card. Flash the Tablet Power off the device. Insert the SD card.
Power on the tablet. The firmware should automatically begin installing.
: Once finished, remove the SD card before the system reboots to prevent it from re-triggering the installation loop. Important Note
: WM8850 tablets have many board variations. Flashing the wrong version (e.g., trying to use V1.2 firmware on a V2.0 board) can lead to a "brick" or hardware malfunction. Always verify the marking on your PCB before proceeding. or instructions for this firmware once it's installed? WM8850-MID Tablet Firmware Files and Root Instructions
For the Eken W70 V2.0 tablet (powered by the VIA WM8850 processor), the most effective way to restore or update the device is using a specific bootable microSD card method. Because this hardware is legacy, many original manufacturer links are no longer active, but community archives provide the necessary files. 1. Recommended Firmware & Links
The Eken W70 is often interchangeable with "WM8850-MID" generic tablets.
Stock/Rooted Firmware: Version v1.1.0 is widely used for stability.
Universal Uberoid: For a more optimized experience, the WM8850 Universal Uberoid V3.1 (Jelly Bean 4.1.1) is a popular community alternative.
Archive Sources: You can find verified backups on the Internet Archive or through dedicated hardware forums like Android Tablet Forum. 2. Key "Feature" for Installation (The SD Method)
The most critical feature of this firmware is its auto-installer, which triggers during the boot sequence if the correct files are present on a microSD card. Format a microSD card to FAT32.
Extract the firmware package. You must have the FirmwareInstall directory and the wmt_scriptcmd file in the root of the SD card.
Configuring for V2.0: If your screen alignment is off or the touch doesn't work, navigate to FirmwareInstall/config. Look for a file starting with a + sign. To match your specific hardware, remove the + from the current file and add it to the start of the configuration file that matches your specific model (e.g., +MID7_8233...fwc).
Flash: Insert the card while the tablet is off, then hold the Power button. The installation should start automatically and prompt you to remove the card once finished. 3. Troubleshooting "Bricked" or Frozen Units
Reset: If the device freezes after an upgrade, remove the battery (if possible) or hold the Power button for at least 8 seconds to force a hardware reset.
Clean Up: After a successful flash, delete the installation files from your SD card; otherwise, the tablet will try to re-install the firmware every time it reboots.
The Eken W70 tablet, specifically using the WonderMedia WM8850 chipset and V20 build (often marked on the PCB or screen, such as "W70_V20_20121114" or similar late 2012 dates), commonly requires specific WM8850 firmware files to be flashed via SD card. Key Information & Files: Firmware Source:
The most commonly referenced, working, and rooted firmware for Eken WM8850 MID tablets is available via a detailed guide by CNX Software File Needed:
Specifically look for firmware files designed for WM8850 (e.g., W70-1.1.0-2012-08-15.rar, or specifically for V20 boards) that include a FirmwareInstall folder and wmt_scriptcmd Rooting/Modification:
The provided firmware often includes rooted images, and additional rooting tools like RootBurner are specifically designed for this chipset. Flashing Method: Format a Micro SD card (FAT32). Extract the firmware files, copying the FirmwareInstall directory and wmt_scriptcmd to the root of the SD card. Insert the card into the powered-off tablet.
Turn on the tablet, and it should automatically enter the update process.
Once finished, remove the SD card and delete the files to prevent re-flashing upon reboot.
Note: As this device is from 2012, many original Eken site links may be dead, making the archived links on tech forums (like CNX Software ) the primary source. wondermedia wm8850 | Early Bird Club
The late afternoon sun filtered through the blinds of Elias’s cluttered workshop, illuminating a graveyard of forgotten technology. Elias, a man whose beard held traces of soldering flux and whose fingers were permanently stained with thermal paste, was on the hunt. He wasn't looking for gold or jewels; he was looking for the legendary "Unicorn" of the budget tablet era: the Eken W70.
Specifically, he needed the version running the V20 hardware revision with the Wondermedia WM8850 processor. It was a frustrating, low-power chip that had powered a thousand generic, no-name tablets in the early 2010s. But Elias had a client—a nostalgic collector—who insisted that this specific combination, when tuned correctly, could run a piece of abandonware audio synthesis software better than any modern emulator.
"Just one link," Elias muttered to himself, his eyes scanning the glowing monitor. "That’s all I need. The firmware link."
The problem was that the internet had moved on. The forums from 2012 were dead, the file-hosting sites long since purged. The "link" was a ghost.
He cracked his knuckles and began the digital excavation. He started with the common repositories, typing eken+w70+v20+wm8850+firmware+link into the search bar. The results were a wasteland of broken 404 errors and parked domains.
"Come on," he whispered. "Talk to me."
He went deeper, firing up the Wayback Machine. He entered the URL of an old Russian tech forum he used to frequent. The page loaded slowly, a grainy snapshot of the past. He saw the thread: "[ROM] WM8850 Uber-Mix for Eken W70." The Eken W70 tablet, featuring the VIA WonderMedia
Elias’s heart skipped a beat. He scrolled down to the first post. There it was: the download button. He clicked it.
Connection Timed Out.
He slammed his fist on the desk. The archive had captured the page, but not the file. The link was a husk, a signpost pointing to a demolished building.
He tried a different angle. He remembered a Chinese developer, "User88," who had been a wizard with these devices. Elias switched his search terms, omitting the model name and focusing on the chipset: WM8850 V20 ROM dump.
He found a link to a cloud storage drive on an obscure Brazilian blog. He pasted it into his browser. A loading spinner appeared. It spun for thirty seconds. Then, a miracle: a prompt to download a file named W70_V20_0422_IMG.zip.
The file size was 234MB. It matched the specs.
"Got you," Elias grinned.
He downloaded the file, but he knew the battle wasn't over. A firmware file is useless without a way to talk to the tablet. He pulled a battered black box from his shelf—the Eken W70. The screen was scratched, the plastic casing yellowed by sun exposure. It was a brick. It wouldn't even boot to the logo.
He connected it to his PC via a USB cable. Windows made the disheartening dun-dun sound of an unrecognized device.
"Driver time," Elias said. He navigated to his "Drivers" folder, a chaotic directory he had maintained for fifteen years. He searched for WM8850_USB_Driver. He found it, forced the install through Device Manager, and waited.
The Device Manager flickered. Unknown Device became WM8850 Android ADB Interface.
"Now we’re cooking."
He opened the flashing tool, a piece of software that looked like a hacker’s nightmare—grey boxes, hex codes, and cryptic buttons. He loaded the W70_V20_0422_IMG.zip file into the image path. He selected "Wipe Data/Factory Reset" to ensure a clean install.
He hovered the mouse over the "Upgrade" button. "Here goes nothing."
Click.
A progress bar appeared. The tablet screen remained black, but the LED indicator on the side turned a frantic, blinking red.
Writing system... 10%. Writing system... 30%.
Elias watched the bar crawl. Firmware flashing was a delicate process. A power surge, a loose cable, a cosmic ray—it could all end in a permanent hard brick.
Writing system... 85%...
A pop-up window appeared. Elias held his breath.
Upgrade Complete. OK.
The tool prompted him to disconnect the USB. He did so. He took a deep breath and pressed the power button on the tablet.
One second. Two seconds. Three.
The screen flickered. A white android figure appeared, skateboarding across a blue background. It was the iconic boot animation of the era. The resolution was low, the colors slightly washed out, but to Elias, it was high art.
He watched as the boot process spun its wheels. The device was calculating the Dalvik cache. It took three minutes—an eternity in tech time.
Finally, the lock screen appeared. It was the old, jagged ice-cream-sandwich style. He swiped to unlock. The home screen populated with generic icons.
Elias connected the tablet to Wi-Fi. It was sluggish, but it worked. He opened the browser, typed in the URL for the abandonware site, and downloaded the audio app. He installed it.
He plugged a pair of headphones into the dusty 3.5mm jack.
He pressed play on a test track. A synthesized, 8-bit melody rang out, crisp and clear, exactly as the collector had described. The WM8850 chip was handling the audio routing perfectly, utilizing the specific V20 memory mapping that the generic drivers couldn't handle. Pinout definitions
Elias leaned back in his chair, satisfied. He copied the firmware file to three different backup drives and a cloud service of his own.
The link was dead, but the code was alive. He typed out an email to the client:
"I found the ghost. She boots. Bring your checkbook."
Finding the correct firmware for generic tablets powered by the VIA WM8850 chipset can be a challenge, especially for specific models like the Eken W70 (V20). Using the wrong build can lead to a "white screen" or a non-functional touchscreen.
This guide provides the necessary links and steps to restore your device. Firmware Download Links
Depending on your hardware revision, you may need one of the following:
Official Eken W70 V20 Firmware (Android 4.1.1): Download Link (Note: Use a verified mirror if the official Eken site is down).
Universal WM8850 Uberoid Tool: Many users prefer the Uberoid custom ROM for better performance and compatibility. You can find the latest version on the TechKnow Forum. Device Specifications
Before flashing, ensure your device matches these specs to avoid "bricking": Processor: VIA WM8850 (Cortex A9) 1.2GHz - 1.5GHz. GPU: Mali-400. Screen: 7-inch Capacitive, 800x480 resolution. RAM: 512MB DDR3. How to Flash Your Eken W70 V20
Flashing this device is done via a MicroSD card. Follow these steps:
Prepare the SD Card: Use a high-quality MicroSD card (8GB or less is recommended for compatibility). Format it to FAT32.
Extract Files: Unzip your firmware package. You should see a folder named FirmwareInstall and a file named wmt_scriptcmd.
Copy to Root: Move both the folder and the script file to the root directory of your SD card.
Power Off: Ensure your tablet is completely turned off and has at least 50% battery.
Insert and Boot: Insert the SD card into the tablet and power it on.
Automatic Install: The WM8850 bootloader will detect the script. You will see a green progress bar on the screen. Do not touch the device during this process.
Remove and Reboot: Once the screen says "Please remove SD Card," pull the card out. The tablet will reboot automatically into the new firmware. Troubleshooting
Stuck at Logo: If the tablet hangs at the Eken logo for more than 10 minutes, try a different SD card or a different version of the firmware.
Touchscreen Not Working: This usually means the firmware uses a different kernel driver than your specific V20 revision. You may need to try the "Changeboot" tool included in Uberoid packages to swap the touchscreen driver.
Do you have the exact hardware version number found on the back of your tablet or on the internal motherboard?
If you are looking for a "paper" (datasheet or schematic) for the WM8850, these were generally not public. However, the WonderMedia WM8850 Datasheet can sometimes be found on embedded developer forums. It covers:
Most "papers" regarding these tablets were actually "Porting Guides" released by WonderMedia to OEMs on how to compile the Android kernel for their specific hardware configuration.
Search within XDA for "WM8850 firmware". Look for threads from 2014 with attachments.
vondroid (still active as of 2025).Since the official Eken website support page is often down, the best sources for these ROMs are the developer archives from the "Modaco" or "Slatedroid" eras.
How to find the correct download: Because these tablets were generic Chinese OEM devices, "Eken W70" firmware often works on similar clones (like the M009s, M012s, etc.), provided they share the WM8850 processor.
A. Universal WM8850 Uberoid Firmware (Recommended) The most successful way to revive these tablets is using the HcH - Uberoid WM8850 project. This is a "hybrid" firmware designed to work on many WM8850 tablets.
Download Source: Search for "HcH Uberoid WM8850 v12" (or latest version available).
B. Stock Eken W70 Firmware If you want the exact stock ROM:
Verify the Update: After updating, go to your device's settings and verify that the firmware version has been updated as expected.
Reconfigure Your Device: If you performed a hard reset, you'll need to set up your device again. This includes setting up your Wi-Fi, email accounts, and reinstalling any apps.
Report to the Community: If you found the update through a forum or community, consider reporting back on your experience. This helps other users know if the update is stable and worth trying.