Last Updated: June 23, 2026
If your Tecno Spark Go 2 KM4 is stuck on a logo, locked out, or not responding, this guide walks you through the full recovery process with official firmware, the right flash tool, and clear instructions.
Device: Tecno Spark Go 2 KM4 | Chipset: Unisoc T7250 | Flash Tool: SPD Research Tool
Android: Android 15, HIOS 15 | File Type: ZIP (Contains .pac firmware file for SPD Research Tool)
⚠ Warning: Flashing erases all data. Back up first.
Device: Tecno Spark Go 2 KM4 (Unisoc T7250)
Flash Tool: SPD Research Tool
Latest Build: 15.1.2.129SP02
Firmware Files: 5 available
What You Need: Windows PC, USB data cable, SPD Research Tool, USB drivers
Time Required: 10-20 minutes (plus 3-8 min first boot)
Tecno Spark Go 2 KM4 Firmware (Flash File) Drivers, Tools & Guide
I have worked on Tecno Spark Go 2 KM4 devices recently, and the most frequent issue is not the flashing process itself, but rather selecting the wrong .pac file and receiving an error from the tool. This guide provides the necessary files and steps to restore the device to factory condition.
One detail to keep in mind before you begin: the firmware package for Unisoc devices is a single .pac file, not a folder of separate partitions like you would see with MediaTek. Make sure your downloaded ZIP actually contains that .pac file before you open the flash tool. A lot of time gets wasted loading an empty or partially downloaded archive.
The Tecno Spark Go 2 KM4 is a relatively recent device (released 2025), so you should expect active firmware updates and good driver support on modern Windows systems. The Tecno Spark Go 2 KM4 uses a Unisoc T7250 chipset (Unisoc/Spreadtrum), so you will need SPD Flash Tool and SPD USB drivers. These tools are specific to Unisoc-based devices and will not work with MediaTek or Qualcomm phones. The stock firmware ships with Android 15, HIOS 15, which determines the default apps, security features, and interface you will see after flashing.
With 5 firmware versions archived for the Tecno Spark Go 2 KM4, this page covers multiple Android builds and security patch levels. As a Transsion Holdings brand, Tecno devices share similar chipset architectures and flashing procedures across the Spark Go 2 lineup.
Your Tecno Spark Go 2 KM4 firmware comes as a compressed ZIP file. Download and extract it using WinRAR or 7-Zip. Once extracted, open the folder and confirm it contains the .pac file before proceeding.
A full flash will erase everything on the device: apps, accounts, photos, and settings. That is the point, it gives you a clean slate and resolves issues like screen locks, FRP prompts, dead boot states, sluggish performance, and connectivity problems.
Remove FRP Lock on Tecno Spark Go 2 KM4
The quickest method to bypass FRP on Tecno Spark Go 2 KM4 is to use a free Android apps launcher that allows access to settings during the setup wizard. After flashing or performing a factory reset you may see a Google account lock (FRP). Our free Android apps launcher is the fastest way to get past it. This is also why I always recommend removing your Google account before flashing, it avoids this problem entirely.
Reset Tecno Spark Go 2 KM4 From Recovery Mode
To factory reset Tecno Spark Go 2 KM4 without a computer, power off the device completely, then hold Volume Up and Power at the same time until the recovery menu appears. Use the volume keys to navigate to “Wipe Data/Factory Reset” and confirm with the Power button.
A hard reset erases all data and restores Tecno Spark Go 2 KM4 to its original factory state. This fixes most software problems, slow performance, app crashes, forgotten screen locks, and bootloops. If the issue persists after a factory reset, a full firmware flash using SPD Research Tool is covered in the following sections.
Which Firmware Version Does Your Tecno Spark Go 2 KM4 Need?
The most common error users make is flashing firmware meant for a different variant. Before downloading anything, verify your exact device identity:
- Open About Phone: Your device model must read “KM4” exactly. Even small differences in the code can mean a completely different chipset and partition layout.
- Verify the Chipset Type: This firmware targets Unisoc T7250 specifically. Flashing it on a different chipset will fail or could brick the device.
- Check Your Current Firmware Version: Compare your build number with the versions listed in the download section to decide which file to use.
- Use Recovery Mode: If you cannot access Settings (phone is stuck or locked), boot into recovery mode to read the build and chipset details from the screen.
- Regional Compatibility: Some Tecno firmware packages target specific regions. Confirm the download matches your device origin.
Common Reasons to Reinstall Tecno Spark Go 2 KM4 Firmware
The Tecno Spark Go 2 KM4 runs on a Unisoc (Spreadtrum) chipset, and the most reliable way to fix software issues on these devices is a clean firmware flash using SPD Research Tool. Here is what the stock firmware can fix:
- Recover your device when it only boots into recovery mode.
- Unlock your device if it has been locked or disabled.
- Restore the original Tecno stock ROM to keep your warranty valid.
- Restore system apps that were accidentally removed or corrupted.
- Remove persistent malware or adware that survives a factory reset.
- Resolve touchscreen responsiveness issues caused by a corrupted system build.
- Resolve .pac loading failures and communication errors in SPD Research Tool that prevent normal use of your device.
Learn more about stock ROMs and why flashing works.
Firmware Details for Tecno Spark Go 2 KM4
This section provides the specifications for the official firmware package:
| Firmware Information | Details |
|---|---|
| Device Model | Tecno Spark Go 2 KM4 |
| Firmware Version | 15.1.0.105SP09, 15.1.0.105SP09(OP001PL001AZ), 15.1.0.113SP02, 15.1.0.153SP01, 15.1.2.129SP02 |
| File Size | 3.8 GB to 4.8 GB |
| Android Version | Android 15, HIOS 15 |
| Platform | Unisoc T7250 |
| Release Date | Released 2025, June |
| Region | Global, Africa and Asia |
| File Type | ZIP (Contains .pac firmware file for SPD Research Tool) |
Which Firmware Version Should I Download?
Use the table below to determine which specific firmware file matches your current situation:
| Your Situation | What I Recommend |
|---|---|
| Phone is completely dead or stuck on logo | 15.1.2.129SP02, download this one. It is the latest Tecno Spark Go 2 KM4 firmware available. |
| FRP / Google account lock only | See the FRP bypass guide above, you likely do not need the full firmware for this. |
| Phone slow after a recent OTA update | Try the next older version, sometimes the latest OTA introduces new bugs and an older build runs better. |
| IMEI missing after a previous flash | Re-flash 15.1.2.129SP02 first, then follow the IMEI repair guide. Do not skip the reflash. |
| 15.1.2.129SP02 failed with a flash error | Try the next older version instead and double-check your .pac file selection before assuming the firmware is the problem. |
| Restoring to factory / warranty repair | 15.1.2.129SP02, clean state, fresh start. |
With Unisoc devices, I recommend using the latest .pac file first. Older versions of the SPD Research Tool firmware can sometimes cause modem issues, which show up as no signal after flashing. Only try an older version if the latest one does not work for you.
Download Tecno Spark Go 2 KM4 Firmware
You can find the official stock firmware for your Tecno Spark Go 2 KM4 below. The latest available version is 15.1.2.129SP02. After downloading, verify the file size matches the table above, a size mismatch usually means a partial or corrupt download, and flashing a corrupt file can cause more problems than it solves.
| Software Details | Download Link | Members Link |
|---|---|---|
|
File Name: KM4_15.1.0.105SP09_OP001PL001M1_120525_SPD.zip Size: 4.8 GB | Download Link | Download Link2 |
| File Name: KM4-15.1.0.105SP09(OP001PL001AZ).zip Size: 4.8 GB | Download Link | Download Link2 |
| File Name: Tecno Spark Go 2 KM4 (KM4-15.1.0.113SP02-BASE001PL001AZ-250603V4144).7z Size: 4 GB | Download Link | Download Link2 |
| File Name: Tecno Spark Go 2 KM4 (KM4-15.1.0.153SP01-BASE001PL001AZ-250813V5050).7z Size: 4.1 GB | Download Link | Download Link2 |
| File Name: Tecno Spark Go 2 KM4 (KM4-15.1.2.129SP02_BASE001PL001AZ).7z Size: 3.8 GB | Download Link | Download Link2 |
Only download firmware that is fully compatible with your exact device model. See the firmware selection guide above if you are not sure.
Important: The Tecno Spark Go 2 KM4 (KM4) should not be confused with other Spark Go 2 variants that may have different chipsets or regional firmware. Even devices in the same Spark Go 2 line can use completely different processors. Always verify your exact model code “KM4” in Settings > About Phone before downloading any firmware from this page.
- The model code on your phone must match KM4 exactly. Even a single letter variant (like adding or dropping an “i” or “s”) can mean a different chipset inside.
- Your chipset should be Unisoc T7250. Recovery mode shows this information if you are not sure.
- Do not mix firmware from other download sites with the files on this page.
- If the downloaded file is much smaller than what is listed in the table above, re-download it, partial files will fail.
Prepare Your Tecno Spark Go 2 KM4 for Flashing
Proper preparation is essential before starting the flashing process. The most common reason Tecno Unisoc flashes fail is skipping the driver installation step. SPD Research Tool is very particular about drivers, and Windows will not always tell you when they are missing.
- Save Your IMEI Numbers: Type *#06# in the phone dialer and note down both numbers. These are your device identifiers for the cellular network. If flashing wipes them, you will need the originals to write them back.
- Disconnect Google Accounts: Before you start anything, remove all Google accounts from the phone. Settings then Accounts then tap each Google account and remove it. This avoids the FRP verification screen that appears after flashing if accounts were still linked.
- Create a Backup: Copy your data to your computer or an SD card. Flashing replaces the entire software on the phone, which means all personal data, apps, and settings will be permanently deleted.
- Charge First: Get the battery above 50% before starting. The flashing process takes a few minutes and the first boot takes several more. A power failure during either stage can leave the device in a state that requires more advanced recovery.
- Prepare Your PC Connection: You need a Windows computer and a USB cable that supports data transfer. Test the cable first by connecting the phone normally, if it shows up in File Explorer, the cable is good.
- Install the Right Drivers:
- Tecno USB Drivers (includes Spreadtrum USB drivers)
Tecno Spark Go 2 KM4 Firmware Installation Guide
We are using the SPD Research Tool for this. It is the standard tool for Unisoc-based devices. One thing I always do: run it as Administrator. Right-click the .exe and choose “Run as administrator.” This prevents a number of permission-related errors. You can also follow the video guide below if you prefer to see the process in action.
- Download the Firmware Package:
- Use the download links in the table above to get the correct firmware file for your device.
- Extract the archive with WinRAR or 7-Zip. Use a short folder path like
D:flashto avoid issues with some tools.
- Check Drivers:
- All drivers from the prerequisites must be installed before connecting your device. Restart your computer after installing them.
- Load the Firmware File:
- Click the “Load Packet” button and navigate to the extracted folder to select the .pac file.
- Connect Your Device:
- Power off your phone completely, not sleep mode, fully off.
- Connect to your PC via USB cable. The flash tool will detect it automatically.
- Start Flashing:
- Press “Start” to begin writing the firmware to your device.
- Do not unplug the phone, close the flash tool, or interact with the device until the process is 100% complete.
- Wait and Reboot:
- After the tool confirms the flash is complete, safely disconnect your phone.
- Press the power button to start your device. The initial boot is slow, wait up to 8 minutes before assuming there is a problem.
Video Guide for Flashing
Fix Common Tecno Spark Go 2 KM4 Firmware Errors
- Tecno Spark Go 2 KM4 Not Recognized by SPD Research Tool:
- In most cases this is a driver issue, not a cable issue. Reinstall the Spreadtrum USB drivers for the KM4, restart your PC, then try again.
- If the device is still not detected, try a different USB port, USB 2.0 ports tend to work more reliably with Unisoc devices than USB 3.0.
- Temporarily disable your antivirus software, it can sometimes block the Spreadtrum driver from loading without showing any error.
- Boot Loop After Flashing:
- Enter recovery mode and perform a factory reset. This resolves most post-flash bootloops on Unisoc devices. If recovery mode is also not accessible, reflash the firmware from scratch.
- Wrong .pac File Selected for KM4:
- If SPD Research Tool throws an error immediately after you load the file, you have likely selected the wrong firmware. Confirm that the .pac file model code matches your Tecno Spark Go 2 KM4 exactly.
- No Signal After Flashing:
- This usually points to an IMEI issue. Dial *#06#, if it shows null or unknown, follow the IMEI repair guide above before inserting your SIM card.
What Is Normal After a Tecno Spark Go 2 KM4 Flash?
Understanding what happens after a successful flash helps you avoid unnecessary worry.
- How to know the flash was successful: SPD Research Tool will show a green “PASSED” message when the flash is complete. If you see this, you are done.
- Wi-Fi, Bluetooth, and mobile data should all work right after setup. If mobile data is not connecting, go to Settings, SIM and Network, and re-enter your APN manually, the flash sometimes clears carrier APN settings.
- Dial *#06# immediately after setup to check your IMEI. Do this before you insert a SIM card. If it shows “unknown” or “null”, follow the IMEI repair guide below before doing anything else.
- First boot takes 3 to 8 minutes, do not force-reboot the device. The operating system is setting itself up from scratch. Interrupting this is how devices end up in bootloops.
- Notification sounds and ringtones will be back to factory defaults. Any custom tones you had set before will need to be re-downloaded and re-assigned in Settings.
- Storage will show almost full capacity available since all your apps and files are gone. The system partition size varies by firmware version but is typically 4 to 8 GB on most devices.
- Stuck in a bootloop after first boot? Enter recovery mode and do a factory reset from there, see the hard reset guide above. This can happen occasionally and does not mean the firmware is wrong.
Missing IMEI or Corrupt Baseband on Tecno Spark Go 2 KM4 After Flashing?
A missing IMEI after a Unisoc flash usually means the NVRAM partition was not written correctly during the flash. This happens more often than it should on SPD devices. The WriteIMEI Tool handles this well for Unisoc. Just make sure you have your original IMEI written down from before you flashed, dial *#06# before starting next time. Without the original number, you cannot restore it properly.
Use WriteIMEI Tool for Unisoc to restore it. The video guide below shows the exact steps.
Video Guide: How to repair IMEI
Common Questions About Flashing Tecno Spark Go 2 KM4
Q1: Can I use a Mac or Linux computer for this?
A: The tools and drivers referenced on this page are Windows-only. If you are on Mac or Linux, your best option is to use a Windows virtual machine, or borrow a Windows PC for the 10 minutes it takes to complete the flash.
Q2: Do I need an internet connection during flashing?
A: No. The flashing process is entirely offline, it happens between your PC and the phone via the USB cable. You do not need internet at any point during the flash itself. You will need internet later to set up the phone and download your apps.
Q3: Will flashing void my warranty?
A: Flashing official stock firmware generally does not void your warranty since you are restoring the device to its factory-intended state. However, some manufacturers may flag that the bootloader was unlocked or that the flash counter increased. Check your specific warranty terms with Tecno support if you are concerned.
Q4: Is this firmware compatible with other Tecno models?
A: No. This firmware is built specifically for the Tecno Spark Go 2 KM4 running on the Unisoc T7250 chipset. Even variants of the Spark Go 2 with a different letter suffix can have a completely different chipset inside. Flashing the wrong firmware can leave your phone in a state that is very difficult to recover from. Always check your exact model number in Settings.
Q5: What should I do if I encounter an FRP lock after flashing?
A: Use our free Android apps launcher. FRP lock activates when a Google account was still signed in before flashing. This is why signing out of your Google account before flashing avoids this issue entirely.
Q6: Can I go back to an older firmware version?
A: It is technically possible on some Unisoc builds, but downgrading can cause security issues and app compatibility problems. If the latest version is causing trouble, leave a comment below, there is usually a better fix than rolling back.
Q7: What if the flash fails halfway through?
A: Do not panic and do not disconnect the phone. Close SPD Research Tool, restart it, and try the flash again from the beginning. In most cases, a failed flash just means the process needs to be repeated. The device is usually still detectable by the flash tool even after a failed attempt.
Q8: My device is not detected by SPD Research Tool. What should I do?
A: Start with the drivers, reinstall the Spreadtrum USB drivers, restart your PC, then try again. Switch to a USB 2.0 port if you are on USB 3.0. Disable your antivirus temporarily. If none of that works, leave a comment with the exact error message.
People Also Ask About Tecno Spark Go 2 KM4
What chipset does the Tecno Spark Go 2 KM4 use?
The Tecno Spark Go 2 KM4 runs on the Unisoc T7250, a Unisoc (Spreadtrum) processor. You will need SPD Flash Tool (also called SPD Research Tool) and SPD USB drivers to flash firmware on this device.
Will flashing firmware on Tecno Spark Go 2 KM4 erase my data?
Yes. Flashing stock firmware on the Tecno Spark Go 2 KM4 with SPD Research Tool performs a full factory reset. All apps, photos, contacts, and accounts will be removed. Back up everything important before you start. There is no way to recover data after flashing.
Can flashing firmware fix a bricked Tecno Spark Go 2 KM4?
Yes. If your Tecno Spark Go 2 KM4 is stuck on the logo, in a bootloop, or will not turn on, flashing the stock firmware with SPD Research Tool can restore it to working condition. This is the standard repair method used by service centers for Tecno devices.
How do I check my Tecno Spark Go 2 KM4 model number before flashing?
Go to Settings > About Phone on your Tecno Spark Go 2 KM4 and look for the model number “KM4”. You can also confirm by entering recovery mode (Volume Up + Power while powered off) which displays the build number and model code. Always match this exactly with the firmware filename before flashing.
Tecno Spark Go 2 KM4 Firmware, Final Notes
Your Tecno Spark Go 2 KM4 should now be running 15.1.2.129SP02 on a clean build. If the first boot takes a while, do not worry, that is completely normal after a fresh flash.
Ran into something unexpected? Leave a comment and describe what happened. Include which step you were on and what error you saw. I will get back to you.
Consider sharing this guide with anyone else who has a Tecno device that needs fixing.
Browse all Tecno firmware downloads for more devices.
Disclaimer: Flashing stock firmware is performed at your own risk. Follow the instructions on this page carefully. I cannot be held responsible for any damage to your device, but I will always try to help if something goes wrong.
