If you've made it this far, it's because you want to know. How to flash a ROM with SP Flash Tool Without making a huge mess of things and, if possible, without bricking your phone or tablet in the process. SP Flash Tool is one of those essential apps for devices with MediaTek processors, but it's also true that, if used carelessly, it can leave your device as a pretty paperweight.
Throughout this guide you will find an explanation step by step and in clear Spanish how to prepare your PC, install drivers, configure SP Flash Tool, and understand what each file does (including dangerous ones like PRELOADER, DSP_BL o NVRAM) and, of course, how to safely start the flashing process on both mobile phones and tablets.
What is SP Flash Tool and what is it used for?
SP Flash Tool is a Tool for flashing firmware on MediaTek devicesThis tool allows you to flash both phones and tablets from a Windows computer (and there are also versions for other systems). It lets you load the complete factory ROM, a modified ROM, or specific parts of the system (boot, recovery, system, etc.) using a special file called scatter which describes how the internal storage is organized.
This program is mainly used for install the original ROMThis allows you to change the firmware or recover bricked devices that won't boot correctly. It's especially useful on very limited devices (like some educational tablets or devices with firmware controlled by governments or manufacturers) where you want to remove a locked ROM and install a more open one or the stock ROM.
Materials needed before starting
Before you start flashing, you need to prepare a series of basic files and tools on your PC. Skipping this part usually results in errors, crashes, or the device not even being detected.
1. Drivers Preloader / VCOM
The first thing is to have the correct USB VCOM Preloader drivers So that Windows recognizes your MediaTek tablet or mobile device when you connect it while it's turned off. In many tutorials, these drivers come in a package called something like Preloader_Driver.zipwhich usually includes an automatic installer (for example, install.bat).
These drivers allow your computer to appear as in the Windows Device Manager. USB VCOM Port PreLoader (COMx) It will light up for a few seconds when you plug it in while it's off. It's completely normal for the port to disappear after a while and for the device to switch to charging mode as if nothing happened, so don't worry.
2. SP Flash Tool
You also need to download a stable version of SP Flash Tool compatible with your deviceIn many examples, a package similar to the following is used: SP_Flash_Tool_v5.1352.01.zip, which contains the executable flash_tool.exe and all the files necessary for the program to work.
It is recommended that Unzip SP Flash Tool into a folder with no special spaces in the path (for example, in C:\SPFlashTool) and always run it as administrator to avoid permission problems when accessing COM ports or ROM files.
3. Supported ROM in SP Flash Tool format
The third essential ingredient is a ROM prepared specifically for SP Flash ToolWhen you extract it, you'll see several binary files and partition images, as well as a text file named something like . MT6592_Android_scatter.txt (The name changes depending on the chipset, but it always includes the word scatter).
This scatter file is a kind of map of the partitions of the device, and it's what SP Flash Tool uses to know where to place each part of the firmware. Without this file, you won't be able to flash the ROM with the program, so make sure your firmware includes it.
4. A Windows PC and USB cable
Finally, you need a a computer with Windows and a decent USB cableIdeally, use the original cable or a good quality one, and connect it directly to a USB port on your PC (avoid hubs or extension cables if possible). The device must be off when you connect it to start the flashing.
Installing the Preloader (USB VCOM) drivers
Without drivers, SP Flash Tool won't see the device. That's why the first real step is install the Preloader driver correctly in Windows so that the system recognizes the MediaTek download mode.
Normally, in the driver package folder you will see an installer like install.batWhen executed, the script usually automatically detect your Windows version (32 or 64 bits, and the specific edition) and proceed to install the necessary drivers.
During the installation you may see some safety warning windows Windows will indicate that the driver is not signed. Many tutorials recommend accepting the installation, as these drivers are necessary for SP Flash Tool to function with your MediaTek device.
Once the installation is complete, the installer will usually ask you to Press any key to close the windowAt that point, you can connect the tablet or mobile phone to the PC (always turned off) and check in the Device Manager if the famous [device/program name] appears. PreLoader USB VCOM Port (COM…) temporarily.
If you see it appear and disappear after a few seconds, everything is on the right track; That behavior is normal.After the test, disconnect the device and leave it off until you have set up SP Flash Tool.
Prepare SP Flash Tool before flashing
With the drivers now operational, it's time to... Configure SP Flash Tool with the ROM you want to installThis step is key, because here you decide which partitions you are going to flash and which parts of the firmware will remain as they are now.
Open the program and load the scatter file.
Access the folder where you extracted SP Flash Tool and open it. flash_tool.exe (If possible, right-click and select "Run as administrator"). The interface may seem a bit spartan, with many blank boxes and several tabs, but the basic flow is simple.
In the main window, you will see a button called Scatter-loadingWhen you press it, a dialog box will open for you to locate the scatter file within your ROM folder, usually identified as something like MTxxxx_Android_scatter.txtSelect that file and confirm.
After loading the scatter file, SP Flash Tool will fill a List of all partitions that make up the firmware: preloader, recovery, boot, system, cache, userdata, etc. Each entry will have a box checked, the partition name, the image file path, and the memory address where it will be written.
Dangerous files: PRELOADER, DSP_BL, and NVRAM
Many manuals emphasize that certain files are especially sensitive to flashingSpecifically, they usually mention:
- Partition PRELOADER
- Partition DSP_BL (if it appears)
- Any file associated with NVRAM
El PRELOADER and DSP_BL They are closely tied to the device's low-level boot process and specific hardware. Flashing them incorrectly or with a file that doesn't match your model can cause a serious brick, where the device won't even enter preloader mode.
Instead, NVRAM This is the area where critical configuration data is stored, including the IMEI and other network parametersIf you flash an NVRAM that isn't yours or is empty, it's very likely that lose the IMEI and the phone will no longer be able to connect to the mobile network until it retrieve manually.
For all these reasons, many tutorials recommend that if your device It still turns on and works partially.Uncheck or delete the PRELOADER, DSP_BL, and NVRAM files from the folder to avoid touching them. The idea is to flash only what's necessary to change the ROM, leaving the most critical areas untouched.
Choosing which partitions to flash
After loading the scatter file and checking the partitions, you'll probably want to Leave system, boot, recovery, and possibly cache and userdata enabledDepending on the guide you follow and the type of ROM. If your goal is to install the complete stock ROM from scratch, you'll likely leave almost everything selected except for the sensitive elements mentioned earlier.
If it's a factory ROM that's used for recover a badly damaged device If it won't even boot, the tutorial itself might tell you to flash the preloader as well. In that case, you take more risk, but in some deep bricks, it's the only way to rescue the device.
First contact with the flashing process
Once you have everything set up, the crucial moment arrives: Start flashing from SP Flash ToolIt is important to follow the correct order so that the program correctly detects the device when you connect it.
Select the mode and press Download
At the top of SP Flash Tool there is usually a drop-down menu to choose the operation mode (Download Only, Firmware Upgrade, Format All + Download, etc.). In most cases, the safest option is to choose Download Only, which writes the marked partitions without completely formatting other sensitive areas.
Before connecting your phone or tablet, press the button DownloadYou will see that the program enters a waiting state, ready to detect the device as soon as the connection is made through the USB port.
Connect the device while it is off.
With SP Flash Tool waiting, it's time to Connect the device to the PC while it is completely powered off.Use the USB cable and plug it directly into the computer. If the drivers are installed correctly, Windows will briefly detect preloader mode and SP Flash Tool will automatically begin the flashing process.
At the bottom of the window you will see a progress bar The color and percentage change as the different partitions defined in the scatter file are written. This process usually takes from a few seconds to several minutes, depending on the size of the ROM and the port speed.
What to do if the program does not detect the device
If nothing happens when you connect your phone or tablet and SP Flash Tool keeps waiting, you might have a device detection problem. Some tutorials suggest a trick commonly used with MediaTek:
- Remove the battery (if it is removable).
- Hold down the button volume (-).
- With the button still pressed, first connect the cable to the PC and then to the device.
This procedure allows many devices to more easily enter preloader mode or the appropriate mode for SP Flash Tool to recognize them. On devices with a non-removable internal battery, you can try... Turn it off completely, leave it for a few seconds, press and hold volume (-) and plug in the cable.
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Flashing complete and Download OK message
If everything has gone well, at the end of the process you will see a pop-up window with the message “Download OK” This is accompanied, depending on the version, by a green icon. This confirms that the ROM has been successfully flashed to the selected partitions.
At that point you can Close the notification and also close SP Flash ToolThe program no longer needs to remain open. Disconnect the device from the USB cable, wait a moment, and then turn it on by pressing and holding the power button.
The first boot after flashing usually take considerably longer than normalSo don't panic if you see the logo for a while. If after several minutes the device is still stuck on the logo, it could be a sign that it's "stuck" on the boot screen, which is often fixed with a couple of wipes from recovery mode.
Recommendation: Enter recovery mode and perform wipes
Many users and guides advise that, after installing a ROM with SP Flash Tool, it is It is highly recommended to enter recovery mode and perform some basic wipes to avoid conflicts between remnants of the old ROM and the new one.
Once inside recovery mode (stock or custom), it is usually suggested to perform these two wipes:
- wipe data / factory reset (factory reset)
- wipe cache (delete the cache partition)
These deletions help the system boot clean, with no residue from old settings which can cause crashes, reboot loops, or getting stuck on the logo. Keep in mind that wiping data erases apps and user data, so proceed knowing that you will lose the information stored in internal memory if you haven't backed it up.
Important warnings and liability
This entire process, although widespread and quite tested in the community, entails real risks to your deviceFlashing always carries the possibility of errors, power outages, corrupted files, or ROMs unsuitable for your specific model.
Although many people share their methods after having used them Successfully tested on your own phone or tabletHowever, that doesn't guarantee it will work the same for you. There could be different hardware revisions, model variations, changes to the original firmware, or simply a corrupted file.
Therefore, any modification you make with SP Flash Tool under your sole responsibilityNeither the authors of the tutorials, nor the community, nor this guide can offer guarantees that the procedure will work perfectly in all cases.
SP Flash Tool and educational tablets or restricted devices
A fairly common use of SP Flash Tool is in educational tablets or devices provided by institutions These devices often come with very limited ROMs, full of restrictions or forced software. Many users want to restore the manufacturer's original ROM or install a functional ROM to take full advantage of the hardware without the pre-installed limitations.
For example, there are cases of tablets with names similar to Multilaser M8 4G With models like ML_SO1V that come with a very restricted educational or government ROM. The idea of some users is to flash a ROM that simply replaces that restricted version and then install another ROM compatible with the hardware using SP Flash Tool.
In contexts like this, it's essential to understand that not all ROMs you find online will be compatible with your exact modelEven if the device name seems similar, using SP Flash Tool with a ROM that doesn't correspond to your variant can render your device unusable. Therefore, it's advisable to research thoroughly, compare references, and ensure that the chosen firmware has been tested on the same model.
Practical tips to minimize problems
In addition to following the basic steps, there are a number of good practices that greatly reduce risk to finish off a brick:
- Make sure the ROM is specific to your model and revisionnot just “similar”.
- Make, if possible, one NVRAM and IMEI backup before touching anything.
- Avoid flashing PRELOADER, DSP_BL and NVRAM if your device still boots up and it's not essential.
- Always use a quality usb cable and direct USB ports on the PC.
- Make sure the Don't let your PC run out of battery (on laptops) during the process.
- Do not touch anything or disconnect the cable while using SP Flash Tool Show progress.
With these ideas clear and a little patience, flashing with SP Flash Tool stops being a lottery and becomes a relatively controlled and predictable procedure to recover, update or unlock the potential of your MediaTek mobile or tablet.
Mastering SP Flash Tool involves Understand what each element you touch does, respect critical files, and follow a logical order.Prepare drivers, load the scatter correctly, select the partitions properly, press Download before connecting the device while it is off, and verify that the process ends with the expected “Download OK”.
If you add caution with PRELOADER, DSP_BL and NVRAM, and finish with the appropriate wipes in recovery, you'll have a much better chance of your flash being a success and not a source of scares. Share this information so that more users can learn about this tool.
