Download Digma Linx A450 3G Stock Firmware (Flash File)

This page contains the official stock ROM for the Digma Linx A450 3G (LT4028PG) smartphone. This flash file is the definitive solution for users needing to fix major software issues, such as a phone stuck on the Digma logo (bootloop), system errors, virus infections, or to unbrick a completely unresponsive device. Flashing the stock firmware will restore your phone to its original factory condition.

Our guide provides the direct download link and a detailed, step-by-step tutorial on how to use the SPD Upgrade Tool to safely install the firmware.

Digma Linx A450 3G Firmware Details

Here are the key specifications for this official firmware package:

Why Should You Flash Stock Firmware?

Reinstalling the official operating system can resolve a variety of critical software problems:

• Unbrick Your Phone: This firmware can revive a device that is completely unresponsive or fails to boot past the startup logo.
• Fix System Errors: Resolves frequent application crashes and “Android System has stopped” error messages.
• Eliminate Viruses and Malware: A complete firmware flash is the most thorough method for removing malicious software.
• Boost Performance: Restoring the clean, original OS can fix issues with lag, stuttering, and general slowness.
• Return to Factory Condition: This process will remove all user data, custom ROMs, and root access, preparing the device for sale or a fresh start.

⚠️ Important: Prerequisites Before Flashing

To ensure an error-free installation, you must complete these steps first.

• Backup Your Data: The flashing process will completely erase all data from your phone’s internal storage.
• Charge Your Phone: Make sure your Digma Linx A450 3G has at least a 50-60% battery charge.
• Install Spreadtrum Drivers: Your PC needs the correct drivers to recognize your phone. Download and install the Spreadtrum (Unisoc) SCI USB2Serial Drivers on your Windows computer.
• Download the Flashing Tool: This firmware is a .pac file and must be flashed using the SPD Upgrade Tool. You can download the latest version from a trusted source here.

Download Official Firmware for Digma Linx A450 3G

• File Name: Digma_Linx_A450_3G_LT4028PG_20170522_SPD.zip
• Size: 602 MB
• 🔗 Download Link (Google Drive): Digma Linx A450 3G Firmware

How to Flash the .PAC Firmware File

1. Download and extract both the firmware zip file and the SPD Upgrade Tool onto your PC. You will find a large .pac file inside the firmware folder.
2. Launch the UpgradeDownload.exe application from the SPD Upgrade Tool folder.
3. Click the first Gear icon (Load Packet) in the top-left corner of the tool.
4. Navigate to the folder containing your extracted firmware and select the .pac file. The tool will take a few moments to load and verify the firmware.
5. Once the file is loaded, click the Play icon (Start Downloading) to put the tool in flashing-ready mode.
6. Completely power off your Digma Linx A450 3G phone. If the battery is removable, take it out for a few seconds and reinsert it.
7. Press and hold the Volume Down button. While holding it, connect your phone to the PC with a USB cable.
8. The SPD Upgrade Tool will automatically detect the phone and the flashing process will begin. You can now release the Volume Down button.
9. Do not disconnect the phone until the process is complete. This can take several minutes.
10. A green “Passed” message will be displayed in the tool once the flash is successful.
11. You may now disconnect your phone and power it on. The first boot will take longer than usual as the system initializes.

Disclaimer: Flashing firmware is a technical process that carries inherent risks. Failure to follow the instructions precisely could damage your device. We are not responsible for any data loss or damage that may occur. Please proceed with caution.