Enables direct loading of database files ( .db or pac files) to ensure accurate parameter calibration.
Compatible with a wide range of Spreadtrum/UNISOC processors.
Ensure you are using the correct connection mode. Switch from Normal mode to Calibration mode, or verify that the device is completely powered down before connecting.
Reinstall the Spreadtrum SCI USB drivers. Try holding the Volume Up button instead of Volume Down when plugging in the cable, or use a different USB port (preferably a USB 2.0 port on the back of the PC). "Write Fail" or "NVRAM Protected" spreadtrum imei tool v41 updated
The device has a locked bootloader or a secure NVRAM structure that rejects direct diagnostic writes.
Select the appropriate communication port type (usually set to or Mode_Production depending on the specific device manual).
Once the interface opens, click on the button (often represented by a gear icon). Here, you can select the parameters based on your device requirements: Enables direct loading of database files (
To help tailor this guide, let me know the , the specific chip number it uses, or any error codes you are seeing during the writing process. AI responses may include mistakes. Learn more Share public link
How does v41 compare to other popular IMEI repair solutions?
Spreadtrum IMEI Tool v41 is an updated utility designed for devices using Spreadtrum/Unisoc chipsets. It provides technicians and advanced users with tools to read, write, back up, and restore IMEI and other device identifiers. The v41 release focuses on improved chipset compatibility, stability fixes, and streamlined user experience. Switch from Normal mode to Calibration mode, or
: Supports Calibration Mode, Normal Mode, and Flash Mode.
Located on the phone's box or under the battery. USB Cable: A high-quality data cable. Battery: The phone must have at least 50% charge. How to Use Spreadtrum IMEI Tool v4.1 Updated (Step-by-Step) Follow these instructions to repair your device's IMEI:
While the Spreadtrum IMEI Tool is a popular choice, several other tools can perform similar functions on Unisoc/Spreadtrum devices:
Whether your device lost its IMEI after a firmware flash, shows an "Invalid IMEI" error, or displays "IMEI 000000000000000," this updated tool provides a direct solution to restore network connectivity. What is Spreadtrum IMEI Tool v41?