You will find dozens of tools claiming to flash SPD firmware (Research Download, Upgrade Download, etc.). However, the Infinity Best box stands out for three reasons:

Nokia TA-1174 is a budget smartphone based on Unisoc (formerly Spreadtrum) chipsets. To flash it, you need:

Once you have secured the correct Nokia TA1174 SPD flash file, follow this precise workflow.

Infinity Best (Nokia/BB5 Easy Service Tool) is one of the primary tools for servicing this device. Here is how the tool interacts with the TA-1174 SPD file:

If you are a professional mobile repair technician or an advanced hobbyist, you know the frustration of a bricked smartphone. The Nokia TA1174—a popular budget model often referred to as the Nokia C1 2nd Edition—is no exception. When this device gets stuck in a boot loop, displays the "SP Flash Tool error," or shows a black screen, there is only one reliable cure: the correct SPD flash file.

In this comprehensive guide, we will focus exclusively on using the Infinity Best box to flash the Nokia TA1174. Why Infinity Best? Because when it comes to Spreadtrum (SPD) chipsets, no other tool offers the same level of safety, speed, and success rate.

Even with the best flash file, you might encounter errors. Here is how to fix them.

| Error Code | Meaning | Solution | | :--- | :--- | :--- | | "Err: SEND_FDL1_FAIL" | Wrong boot loader version or bad USB cable. | Change to USB 2.0 port. Short test point (TP) for BROM mode. | | "Security version mismatch" | Your flash file is older than the current bootloader. | Find a newer Nokia TA1174 file (build number higher than current). | | "Infinity Box not detected" | Driver issue. | Install “SPD Driver” from Infinity folder. Reboot PC. | | "Partition size error" | The phone has bad eMMC blocks or you flashed the wrong model’s file. | Re-download the correct TA1174 file (not TA1157 or TA1198). |