Always save a full Full Flash Backup or NVRAM backup using UMT before flashing any SPD phone. If the IMEI corrupts in the future, you can restore the backup in 10 seconds rather than manually repairing.

Most modern Unisoc chips require the phone to enter a temporary Diagnostic (Diag) mode or direct Flash mode via a specific button configuration.

Master Guide: How to Repair SPD IMEI Using the UMT Tool IMEI corruption on Spreadtrum/Unisoc (SPD) devices is a common issue after a bad firmware flash, a failed factory reset, or system corruption. When a smartphone loses its IMEI number, it displays "IMEI Null" or "000000000000000," resulting in a total loss of cellular network connectivity, calls, and mobile data.

Open the dialer and type *#06# to verify the restored identity. Troubleshooting Common Errors Error Description Root Cause Driver mismatch or bad cable connection.

Try alternative boot keys or check if the device requires an authenticating DA/Loader file. Secure boot protection is active on the device firmware.

Press and hold the (usually Volume Down, Volume Up, or both together depending on the specific device).

Select the exact brand and model of your smartphone from the dropdown menu if listed.

The UMT tool provides an efficient and easy-to-use solution for repairing IMEI on SPD-based devices. By following the steps outlined in this report, users can quickly restore their device's IMEI and resolve network connectivity issues. The UMT tool's support for multiple chipsets and backup/restore features make it a valuable asset for mobile repair technicians and enthusiasts.

This guide and tool are strictly intended for repairing a corrupted, lost, or null IMEI back to its original factory state. Always input the exact IMEI numbers printed on the phone’s original box, battery compartment, or back cover sticker. Prerequisites and Preparation

The UMT Pro Unisoc Module supports a wide array of SPD processors, ensuring compatibility with countless budget and mid-range smartphones from brands like Tecno, Infinix, Itel, Samsung, and others. Its recent updates have focused heavily on modern Tiger and SC-series chipsets.

. In almost all jurisdictions, changing an IMEI to a different number to mask a stolen device is illegal. UMT is designed for

Install the (ensure you install both x86 or x64 depending on your Windows architecture). Restart your PC to ensure driver enforcement updates correctly. Step 2: Launch the Module and Select the Platform Connect your UMT Dongle to the PC. Open the UMT Unisoc / SPD software module.

Hold down the (usually Volume Up or Volume Down, depending on the model) and insert the USB cable.

If the PC does not recognize the phone, uninstall and re-install the Spreadtrum drivers.

Before beginning the repair process, gather the necessary hardware, software, and device data to prevent connectivity failures or bricking. 1. Hardware Checklist

Covers older Spreadtrum (SC) to new UNISOC processors.

Disconnect the phone, turn it on, and dial *#06# to verify the new IMEI.