Here you will find the official Infocus A3 stock ROM (firmware) flash file that you can download on your computer to then flash with the appropriate flashing tool that works for your manufacturer.

Flashing these stock ROM files manually is done by many people all around the world, and generally speaking, it’s not a difficult thing to do. But if you are a little bit uneducated in the firmware department, there are also some things you should know before you pick up your device with the intention of flashing on your mind.

Each mobile device can be locked to a carrier or unlocked after a certain amount of time. Some manufacturers have stricter rules than others. For instance, if you own a Samsung handset, the general rule of thumb is that if your device is locked to a carrier, then you should only flash firmware from that carrier made for your Infocus A3 device. If your device is network unlocked, however, then you can dabble in firmware, still made for your device, but from other carriers. Other manufacturers of smartphones don’t lock things as much, and flashing firmware is a lot easier.

Most people update their mobile devices by sticking with the over-the-air software updates that arrive automatically. But if you didn’t want to use mobile data or if you had a rooted device and didn’t get OTA updates arriving, then you could flash the firmware files manually instead by using a flashing tool.

There are a number of these flashing tools out there, and the one you need to use will depend on your hardware or manufacturer. Most MediaTek devices such as the Infocus A3 can use the SP Flash Tool, while other manufacturers like Samsung have their own Odin flashing tool instead. Tools like Odin aren’t always released in the wild. It’s said that Odin was intended for use by repair centers, but it eventually was leaked online for keen flashers to begin using as well.

What Is Android Firmware?

Firmware is the operating system and its applications that control how the smartphone or tablet that runs on Android operates. While you may see the words “software update available” on your device’s display, we call it firmware to highlight its close relationship with the device manufacturers hardware.

If you prefer technical jargon, firmware is the specific programming that gets written to a device’s non-volatile memory. The firmware gets added to the device during the manufacturing process and is the middleman in helping software run on the hardware. Firmware can be written as read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory.

The Android operating system is more open than much of its competitors in iOS, Windows 10 Mobile, and Tizen. You always get firmware running on your device out of the box, but if you do not like it, you can swap it over with custom firmware or other firmware versions that were made for your device. This flexibility helps with troubleshooting, or if you know you would prefer a different Android version that was made available.

Why Reinstall Stock Firmware?

Did you think you may need to restore the stock firmware on your device? Here are some of the things that you can achieve with stock firmware files:

  • Upgrade or downgrade the version of Android on your device
  • Fix common mobile device-related problems, such as unbearable bugs in the software
  • Remove custom recovery images such as TWRP
  • Unroot the Android operating system, regardless of what method/tool you may have used to get root access
  • Unbrick your smartphone or tablet
  • Reinstall the operating system
  • Fix invalid IMEI problems

Infocus A3 Firmware Flash File Download Links

File Name: Infocus_A3_MT6737M_23102017

Firmware FileDownload

How to Flash Stock ROM Using Smartphone Flash Tool

1. Make sure you have the Android CDC driver installed on the computer that you plan on using the flashing tool on, so your device and the flashing tool can connect. (If you have already installed the Android driver on the computer, then you can skip to the next step; there’s no need to install it twice unless it has been deleted from the computer.)

2. Turn off the Android-based smartphone by holding in the Power button until it powers down, or by switching it off from the Power menu.

3. Download the stock ROM (firmware flash file) from the link above so the file ends up on your computer.

4. Open the stock ROM file location (usually the Downloads folder) and then extract it (right-click and choose “Extract” from the menu).

5. Now download and extract the Smartphone Flash Tool much the same way as you did with the Stock ROM file. (You can use the desktop as the save location to make things easier if you wish.)

6. Once the SP Flash Tool folder is extracted, double-click to open it and then double-click on the SP Flash Tool application.

7. The flashing tool interface will now open on the computer. From the SP Flash Tool interface, select the “Download” tab.

8. Next, click on the “Scatter-loading file” button.

9. Now browse through the hard drive to the location where you extracted the stock ROM and select the “scatter file” to upload to the flashing tool.

10. Lastly, click on the “Download” button for the flashing to begin.

You can also view our more detailed guide on how to flash a stock ROM with the SP Flash Tool that comes with screenshots if you prefer.

Important Notes

[*] Back Up Your Data: You should always back up your data before you begin flashing new firmware files to your smartphone or tablet. All of your pictures, music, videos, documents, etc. should be still on your device after you have updated the firmware, but you may need to restore the contacts and applications from a backup. 

[*] Wipe Cache and Factory Reset: Some people claim that taking a factory reset isn’t necessary after updates, but at the very least you should wipe the system cache after installing new firmware. This way you can help eliminate any performance issues and battery draining bugs. Taking a factory reset is the best way of avoiding common problems many users face after applying software updates. 

Additional Firmware

You can download Android ROMs for other Android devices if you have another smartphone or tablet from a different manufacturer.