Last Updated: June 10, 2026
Restore your Tecno Pop X 4G KN3 to working condition with the official stock firmware. The main issue with these Unisoc devices is usually not the flashing process itself, but picking the wrong .pac file. This guide provides the correct files, tools, and steps to fix the issue.
Device: Tecno Pop X 4G KN3 | Chipset: Unisoc (SPD) | 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 Pop X 4G KN3 (Unisoc (SPD))
Flash Tool: SPD Research Tool
Latest Build: 15.1.2.145SP03(IN001PF001M1)
Firmware Files: 3 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 Pop X 4G KN3 Firmware (Flash File) Drivers, Tools & Guide
You can restore the Tecno Pop X 4G KN3 to working condition with the stock files provided below. The most common issue with Unisoc-powered devices is not the flashing process itself, but selecting the wrong .pac file. This leads to errors that look like a broken phone when the software is just confused. This guide provides the correct files, tools, and steps to fix the issue.
One important detail before you start: 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 Pop X 4G KN3 uses a Unisoc (SPD) chipset, 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. There are 3 firmware files available for the Tecno Pop X 4G KN3 on this page. Pick the one that matches your current Android version for the smoothest flash. The Tecno Pop X 4G KN3 is a relatively recent device, so you should expect active firmware updates and good driver support on modern Windows systems.
With 3 firmware versions archived for the Tecno Pop X 4G KN3, 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 Pop X 4G lineup.
Your Tecno Pop X 4G KN3 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.
Be aware that flashing overwrites the entire software partition. Your data, apps, and accounts will all be removed. This full wipe is how the flash resolves deep software issues, anything from FRP locks and boot failures to Wi-Fi problems and app crashes.
Tecno Pop X 4G KN3 Google Account Bypass After Reset
The quickest method to bypass FRP on the Tecno Pop X 4G KN3 involves using 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 Pop X 4G KN3 From Recovery Mode
Power off the Tecno Pop X 4G KN3 completely and hold Volume Up and Power together 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 Pop X 4G KN3 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 Pop X 4G KN3 Need?
Do not download firmware for a different variant of the Tecno Pop X 4G KN3. Before downloading anything, verify your exact device identity:
- Identify Your Device Model: Go to About Phone and confirm your model is Tecno Pop X 4G KN3. Check the full model string, not just the name.
- Verify the Build Number: Look for the identifier “KN3” in your device build details.
- Confirm the Chipset: According to Tecno specifications, the Pop X 4G KN3 runs on Unisoc (SPD).
- Match the Firmware Version: Check the version and regional details against what is listed in the download table above.
- Verify in Recovery Mode: If you are not sure about the chipset or build number, boot into recovery mode, it displays this information clearly and is the most reliable way to confirm before you flash.
Why Do We Need Tecno Pop X 4G KN3 Firmware?
The Tecno Pop X 4G KN3 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:
- Update to the latest Android version supported by your phone.
- Restore system apps that were accidentally removed or corrupted.
- Remove persistent malware or adware that survives a factory reset.
- Fix startup loops, lagging, and freezing on your device.
- Clear a forgotten screen lock, PIN, or pattern without needing the original credentials.
- Recover your device when it only boots into recovery mode.
- 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 Pop X 4G KN3
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Tecno Pop X 4G KN3 |
| Firmware Version | 15.1.2.134SP23, 15.1.2.145SP03(IN001PF001M1) |
| File Size | 5.4 GB to 6.3 GB |
| Android Version | Android 15, HIOS 15 |
| Platform | Unisoc (SPD) |
| Release Date | Released 2026, March 06 |
| Region | Global, Africa and Asia |
| File Type | ZIP (Contains .pac firmware file for SPD Research Tool) |
Which Firmware Version Should I Download?
This is the question I get asked most often in the comments, so I put together a simple guide. Find your situation in the table and go straight to the right file:
| Your Situation | What I Recommend |
|---|---|
| Phone is completely dead or stuck on logo | 15.1.2.145SP03(IN001PF001M1), download this one. It is the latest Tecno Pop X 4G KN3 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 15.1.2.145SP03(IN001PF001M1) first, then follow the IMEI repair guide. Do not skip the reflash. |
| 15.1.2.145SP03(IN001PF001M1) 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 | 15.1.2.145SP03(IN001PF001M1), 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 Pop X 4G KN3 Firmware
Get the official stock firmware for the Tecno Pop X 4G KN3 from the links below. The latest available version is 15.1.2.145SP03(IN001PF001M1). 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: Tecno_Pop_20_KN3_15.1.2.134SP23_OP001PF001AZ_011225_SPD.zip Size: 6.3 GB | Download Link | Download Link2 |
| File Name: Tecno Pop 20 (KN3-15.1.2.134SP23_BASE001PF001AZ).7z Size: 5.4 GB | Download Link | Download Link2 |
| File Name: Tecno_Pop_20_KN3-15.1.2.145SP03(IN001PF001M1)_Flash_File.zip Size: 5.4 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 Pop X 4G KN3 (KN3) should not be confused with other Pop X 4G variants that may have different chipsets or regional firmware. Even devices in the same Pop X 4G line can use completely different processors. Always verify your exact model code “KN3” in Settings > About Phone before downloading any firmware from this page.
- Confirm your exact model is KN3, check About Phone, not the marketing name on the box.
- Your device must have a Unisoc (SPD) chipset. Boot into recovery mode to verify if unsure.
- Only use files downloaded from this page. Third-party mirrors may serve modified or incomplete packages.
- Compare the file size against the download table. If it does not match, the download is likely corrupt or incomplete.
What You Need Before Flashing Tecno Pop X 4G KN3
Before you start flashing the Tecno Pop X 4G KN3, ensure you have the correct drivers installed. 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.
- Write Down Your IMEI: Open your phone dialer and type *#06#. Take a photo of the screen showing both IMEI numbers. You may need these later to fix your IMEI if it gets wiped during the flash.
- Sign Out of Google: Open Settings, go to Accounts, and remove every Google account from the device. If you skip this, Google will lock the phone after flashing and you will need to do an FRP bypass.
- Save Your Files: Copy everything important to a PC or cloud storage. After flashing, the phone will be completely empty, no apps, no photos, no messages.
- Battery Check: Charge to at least 50%. If the phone dies during flashing, you could end up with a device that will not turn on at all.
- Get the Right Cable: You need a USB data cable, the kind that can transfer files, not just charge. Plug it into a USB 2.0 port on a Windows PC for the most reliable connection.
- Set Up Drivers:
- Tecno USB Drivers (includes Spreadtrum USB drivers)
How to Install Firmware on Tecno Pop X 4G KN3
You will need the SPD Research Tool to install the firmware on the Tecno Pop X 4G KN3. 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 and Extract:
- Download the correct firmware package from the links above.
- Extract the ZIP to a simple folder path, avoid paths with spaces or special characters, as some flash tools have trouble with them.
- Install the Listed Drivers:
- Confirm all drivers listed above are installed and that your PC has been restarted since installation. Skipping the restart is a common reason drivers do not work correctly.
- 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:
- Click the “Start” button to begin.
- Do not disconnect, move the cable, or touch the device until the process is fully complete. Disconnecting mid-flash is how devices get bricked.
- Wait and Reboot:
- Once flashing finishes successfully, disconnect the device.
- Power on your device. The first boot will take longer than usual, give it up to 8 minutes.
Video Guide for Flashing
Fix Common Tecno Pop X 4G KN3 Firmware Errors
- Tecno Pop X 4G KN3 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 KN3, 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 KN3:
- 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 Pop X 4G KN3 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 Pop X 4G KN3 Flash?
Here is what is completely normal after a successful flash:
- 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.
- The phone will feel warm during first boot, this is normal. It settles after a few minutes once the initial app setup is complete.
- Battery percentage may seem inaccurate for the first day. The battery statistics are calibrated during normal use. Charge the phone fully once without interruption and the readings will stabilize.
- 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.
- 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.
- 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.
- The phone may ask for language and region again, this is normal after a flash. You are starting from a clean state, so the setup wizard runs just like when the phone was brand new.
Missing IMEI or Corrupt Baseband on Tecno Pop X 4G KN3 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
Questions About Tecno Pop X 4G KN3 Firmware
Q1: Can I flash this firmware if my phone does not turn on at all?
A: Yes, in most cases. As long as the phone responds to a USB connection (even with a black screen), the flash tool can detect it. If the battery is completely drained, charge it for at least 15 minutes first.
Q2: 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.
Q3: 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.
Q4: Is this firmware compatible with other Tecno models?
A: No. This firmware is built specifically for the Tecno Pop X 4G KN3 running on the Unisoc (SPD) chipset. Even variants of the Pop X 4G 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: 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.
Q6: Is it safe to flash during a power outage risk?
A: It is best to avoid flashing during unstable power conditions. If your PC shuts down during the flash, it can corrupt the write and leave the phone in an unbootable state. If you are in an area with unreliable power, use a laptop with a fully charged battery instead of a desktop.
Q7: 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.
Q8: 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.
People Also Ask About Tecno Pop X 4G KN3
Will flashing firmware on Tecno Pop X 4G KN3 erase my data?
Yes. Flashing stock firmware on the Tecno Pop X 4G KN3 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.
What is the latest firmware version for Tecno Pop X 4G KN3?
The latest available Tecno Pop X 4G KN3 firmware on this page is version 15.1.2.145SP03(IN001PF001M1). This page has 3 firmware builds available for download. Check the firmware details table above for file sizes and Android versions.
What chipset does the Tecno Pop X 4G KN3 use?
The Tecno Pop X 4G KN3 runs on the Unisoc (SPD), 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.
How do I check my Tecno Pop X 4G KN3 model number before flashing?
Go to Settings > About Phone on your Tecno Pop X 4G KN3 and look for the model number “KN3”. 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.
Summary
You have the steps and files needed to restore the Tecno Pop X 4G KN3 to stock using SPD Research Tool. The process is straightforward as long as you follow the steps in order and do not skip the driver installation.
Got stuck somewhere? Drop a comment with the error message and the step number. I check comments regularly and will point you in the right direction.
If this worked for you, share the page so others with the same device can find it too.
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.
