If you have a tablet or mobile phone with a MediaTek processor and want to change the ROM, delete a limited version of the system, or recover the device after a soft brick, SP Flash Tool is one of the most used tools for flashing the complete ROMAlthough it may seem a little intimidating at first, the process is quite simple if you calmly follow a series of steps and understand what each one is doing.
Before you start playing anything, it's important to be clear that Flashing a ROM with SP Flash Tool carries real risksYou can lose data, settings, and even render your device unusable if you load the wrong files or select sensitive partitions. In this guide, we'll break down everything explained in the best Spanish-language tutorials, supplementing it with practical recommendations and key warnings to minimize the chances of failure.
What is SP Flash Tool and what is it used for?
SP Flash Tool (Smart Phone Flash Tool) is a program for Windows and other platforms designed for devices with a MediaTek processor that allows write the different firmware partitions directly to the phone or tablet's internal memory (what we commonly call ROM). It works at a low level and communicates with the device through preloader or bootrom mode.
In practice, with this tool you can Install an official stock ROM, switch to another compatible firmware version, restore a damaged system, or remove a modified or restricted ROM. It comes pre-installed (as is the case with some educational tablets provided by schools or governments). It is also used to unbrick MediaTek devices that have completely stopped booting.
The main difference compared to a custom recovery or a simple OTA update is that SP Flash Tool does more than just update the systembut it can flash many more partitions: boot, system, recovery, userdata, cache, and even very sensitive areas such as preloader, DSP_BL or NVRAM, hence you have to be very careful with what brands you choose and what you leave untouched.
Materials needed before starting
To be able to follow the procedure successfully, you need to prepare a series of basic elements, both at the software and hardware level. Without these prerequisites, it's easy for the PC not to recognize the device or for the flashing process to be incomplete..
First, you need the Suitable drivers for MediaTek preloader mode, usually packaged as Preloader_DriverMany tutorials distribute a compressed file like this one. Preloader_Driver.zip (around 1,4 MB), which includes an Install.bat script to automate the installation according to your version of Windows.
Secondly, you will need to download a compatible version of SP Flash Toolfor example a package like SP_Flash_Tool_v5.xxxzip with an approximate size of 20-30 MB. Inside you will find the main executable flash_tool.exe and other files necessary for the program to function.
Last but not least, you need a Windows PC (preferably a relatively recent version), the appropriate USB cable for your device, and of course, the correct ROM formatted for SP Flash Tool, i.e., a set of partition images plus a text file called scatter (for example, MT6592_Android_scatter.txt) which tells the program how and where to flash each file.
In addition to all of the above, it is highly recommended that before doing anything Make a full backup of your important datasince the process usually involves erasing the information stored in the internal memory of the device.
Install the Preloader driver on Windows
The first real step in the process is getting your computer to recognize the MediaTek device in preloader mode, which is essential for SP Flash Tool to communicate with it. To do this, you must Install the preloader/USB VCOM drivers corresponding to your operating system..
Typically, the driver package includes a folder called something like Preloader_Driver and inside it an installation file install.batSimply double-click on that script (preferably with administrator privileges) and it will automatically detect your version of Windows and install the appropriate driver without you having to choose anything else.
During the process, the installer window will guide you through the steps and When finished, it will ask you to press any key to close.At that point, barring any errors, the driver should already be correctly integrated into the system and ready to use when you connect the device while it is turned off.
Once the drivers are installed, you can do a quick check: Completely turn off your tablet or phone, then connect it to your PC using the USB cable. and open the Windows Device Manager. For a few seconds, you should see an entry appear identified as something similar to USB VCOM Port PreLoader (COMx).
It's important to know that it's completely normal that that port disappears after a few seconds and the tablet goes into charging modeThe preloader mode is only activated briefly when the device is connected while powered off. The important thing is to verify that, even if only fleetingly, Windows detects it with the correct name and without any warning symbols.
Prepare SP Flash Tool and load the scatter file
With the drivers ready, the next step is to launch SP Flash Tool and tell it exactly what to flash. To do this, you must Open the program, locate your ROM's scatter file, and load it. on the tool.
After unzipping the SP Flash Tool package, go into the corresponding folder and run flash_tool.exe (On Windows, it's highly recommended to right-click and select "Run as administrator"). When it opens, you'll see that most of the fields and lists are blank, waiting for you to specify the firmware.
At the top or near the center you will find the button Scatter-loadingTapping it will open a file explorer window so you can navigate to the folder of the ROM you want to install. Inside, there should be a text file with a name like this: MT6592_Android_scatter.txt or similar, depending on your device's processor model.
When you select that scatter file, SP Flash Tool It will automatically populate the main panel with a partition table.showing fields such as preloader, recovery, boot, system, cache, userdata, etc., each associated with a different image file. That is the firmware structure that will be written to your device.
This is the point where you should pay special attention: Flashing all listed partitions is not mandatoryIf for any reason you don't want to overwrite any entries, simply uncheck the corresponding box. This is especially critical with certain sensitive entries, which should not be touched unless you know exactly what you're doing.
Sensitive partitions: PRELOADER, DSP_BL and NVRAM
The most comprehensive tutorials strongly emphasize the importance of not flashing certain files unless absolutely necessary. Specifically, there are three types of elements that should be avoided. Exclude from the process when the device still powers on normally and is not completely bricked.
On one side there is the partition PRELOADERThis contains the code responsible for the most basic initialization of the device, which allows SP Flash Tool to communicate with it. If an incorrect or corrupted preloader is flashed, the risk of deep bricking is very high and it can greatly complicate the team's recovery.
Something similar happens with the file DSP_BL (or their equivalents depending on the platform), also related to very sensitive parts of the boot process and communication with the hardware. Again, if the tablet or phone still powers on and enters the system or at least recovery mode, It is not recommended to check these boxes when preparing the flash.
The third critical zone is NVRAMNVRAM is a partition where data such as the IMEI, MAC addresses, and other unique calibration and configuration information for your device are stored. Flashing a generic NVRAM file or one from another device can cause problems. Loss of IMEI and problems with mobile network, WiFi and Bluetooth.
Therefore, the most repeated recommendation is very clear: if your phone or tablet keeps starting up, Remove PRELOADER, DSP_BL and any NVRAM files from the list (or uncheck them). that may be included in the ROM. This greatly reduces the chances of leaving the device unbootable or without network connectivity.
Select the flashing mode and press Download
Once you've loaded the scatter file and checked which partitions you want to flash and which you'll leave untouched, it's time to prepare SP Flash Tool to wait for the device. Here, it's crucial to follow a very specific order: First you configure the program, then you connect the turned-off terminal..
At the top of the program, you can usually choose between several modes (Download Only, Firmware Upgrade, Format All + Download, etc.). For most users who want to reinstall an official ROM or change firmware without resorting to unusual experiments, It is more prudent to use "Download Only", allowing only the marked partitions to be overwritten without completely formatting the entire memory.
With the appropriate mode selected and the partition boxes checked, the next step is Click the Download button from the toolbar (don't confuse it with other buttons like Format). Doing so will put the program into standby mode, ready to detect the MediaTek device as soon as you connect it to the USB port in preloader mode.
In the SP Flash Tool interface you will see that The bottom progress bar remains empty, but the status indicates that it is waiting for a connection.At this point, you should still not have your phone or tablet connected to the PC; if they were, disconnect them and make sure the computer is completely turned off.
This sequence is important because If you connect the device before pressing Download, the preloader may activate and deactivate without SP Flash Tool ever connecting to it.which means that the flashing never starts and you go crazy staring at the unchanged screen.
Start flashing: connect the device while it is off
With SP Flash Tool ready and waiting, the critical moment arrives: Connect the phone or tablet to the computer while it is completely turned off. so that the program can begin writing the ROM to internal memory.
The standard way is very simple: turn off the device, wait a few seconds to make sure it's not just in standby mode, and Connect it to the PC's USB port using a cable in good condition.If the preloader drivers are installed correctly, SP Flash Tool should detect the device almost immediately and start the flashing process.
From that moment on, at the bottom of the window you will see a progress bar that will advance as the different partitions are copiedIt is essential that, during this period, you do not disconnect the cable, turn off the computer, or close the program; a connection interruption in the middle of writing could leave you with an incomplete system.
Depending on the ROM size and the USB port speed, The process can take from a few seconds to several minutes.It normally goes through several colors and states as it completes each component of the firmware.
If everything goes as it should, at the end of the process SP Flash Tool will display a pop-up window with an icon and the message "Download OK"That message means that the tool has finished writing to all selected partitions without finding any critical errors.
Once you see "Download OK", you can Close both the message and the SP Flash Tool itself, disconnect the device from the USB and then turn it on.The first boot after a full flash usually takes much longer than normal, so be patient and don't be alarmed if the logo stays on the screen for a while.
What to do if the PC does not detect the device
In some cases, especially with certain phone or tablet models, SP Flash Tool appears not to react when connecting the device while it is off.as if it didn't exist. If this happens to you, there are still several tricks you can try before giving up.
One option is to remove the device's battery (if it is removable)Wait a few seconds for the circuits to fully discharge, then reinstall the device without turning on your phone or tablet. Immediately afterward, with the device still off, connect the USB cable to your PC and the device, always with SP Flash Tool in Download mode.
If your device doesn't have a removable battery or it's still not detected, you can try the button combination recommended in several tutorials: Press and hold the volume down (-) button while connecting the USB cableThe ideal sequence is usually to first connect the cable to the computer, press and hold volume down on the phone, and finally plug the connector into the terminal.
That gesture forces, in many models, the entry into a special mode of communication that It allows the preloader to remain active long enough for SP Flash Tool to recognize it.If it works, you'll instantly see the flashing progress bar start.
If after trying these methods it still doesn't detect anything, you'll have to check that The preloader drivers are correctly installed, there are no conflicts in Device Manager, and the cable and USB port are working properly.Sometimes it is necessary to uninstall old drivers and reinstall the package recommended for your version of Windows.
Recommended steps after flashing the ROM
When the flashing process is complete and the device boots with the new ROM, many people consider the process finished, but It is highly recommended to perform some cleaning adjustments to avoid problems arising from remnants of the previous ROM.especially if you have changed your Android version or base firmware.
The most widespread practice is to enter the recovery from the device (either the stock recovery of the ROM you just installed or a custom one if you have it) and perform two basic wipes. To access recovery mode, you usually use the power button + volume up button combination or a similar option, depending on the model.
Once inside the recovery menu, it is advisable to perform a “wipe data/factory reset”This process erases user data and resets the system settings to their factory state, adapted to the new ROM. This step helps prevent crashes, forced shutdowns, and other unusual behavior.
Afterwards, it is also advisable to run a "wipe cache" To clear the system cache partition. This way, the device will rebuild temporary files from scratch, minimizing the possibility of errors caused by old data that no longer matches the new installation.
With these two wipes completed, you can now Reboot the device from recovery mode and let it boot with the newly flashed ROM.The first start-up, again, may be a little slower, but if everything has gone well you should reach the initial setup wizard without further complications.
In scenarios such as some educational tablets or devices with firmware highly restricted by official bodies, after this procedure The device should be freed from the limitations imposed by the original ROMprovided you have installed compatible and functional firmware for your specific model.
Warnings and responsibilities when using SP Flash Tool
All the above information is based on processes tested time and again on real devices, and on guides that have been verified to The most important steps work correctly on MediaTek tablets and mobiles.However, it is essential to emphasize that there is no absolute guarantee of success.
Each phone or tablet model, even within the same brand, may have hardware variants, board revisions, and firmware differences This means that a file that works on one device may not be suitable for another with a different serial number. That's why it's crucial to ensure that the ROM you flash is specifically designed for your device.
Furthermore, the use of low-level tools like SP Flash Tool implies that any errors when selecting files, marking sensitive partitions, or interrupting the process You can leave your device in a state where it no longer turns on or is recognized by the PC without resorting to more advanced methods.
The authors of the guides and those who share the driver packages, ROMs, and tools usually make it very clear that Everything you install is your sole responsibility.In other words, even if you follow the steps to the letter, there is always a risk you must take before continuing.
For this reason, the most sensible thing to do is Carefully read all the documentation related to your model, check specialized forums and, if possible, look for experiences from other users with the same device Before starting the flashing process, gather the most specific information you have; the less likely something will go wrong.
If you follow these tips, understand what each step does, and act calmly, SP Flash Tool can be a very powerful tool for recovering, updating, or unlocking your MediaTek device., leaving it running with a clean stock ROM or with the firmware that best suits your needs without the original restrictions.
