An IMEI is a 15-digit unique serial number that identifies a mobile device on a network. When this number is corrupted (showing as "Null," "0," or "N/A"), the device cannot connect to a cellular network for calls, SMS, or mobile data.
Q: Does v41 New work on Unisoc Tiger T606? A: Yes, partially. The "v41 New" update includes preliminary support. However, very new Tiger chips may require the dedicated "Tiger IMEI Tool."
Q: Do I need root access on my phone? A: No. The Spreadtrum IMEI Tool works at the bootrom/meta mode level, bypassing Android entirely. Root is not required.
Q: Will this tool unlock a network carrier lock? A: No. IMEI repair does not remove SIM locks (e.g., T-Mobile lock, Vodafone lock). You need a separate unlock code.
Q: I wrote the IMEI, but my phone still says "No Service." A: This means the modem firmware is damaged. You need to re-flash the complete stock firmware (including the "modem" and "l_modem" partitions) using SPD Flash Tool, then re-apply the IMEI.
Q: Is v41 New free? A: Typically, yes. The tool is distributed as freeware by various developer communities (e.g., GSM-Forum, XDA Developers). Beware of scams charging for it. spreadtrum imei tool v41 new
Previous versions (v1.0, v3.0, v2.0) had limitations with newer Android versions and SPD chips like SC9832E, SC9863A, and Tiger series. The v41 New update addresses these issues. Here are the key improvements:
Do not download or run "Spreadtrum IMEI Tool v41 new." The risks far outweigh any perceived benefit. If you need to recover a lost or corrupted IMEI on a Unisoc device, seek professional repair or official support channels.
Would you like guidance on how to properly back up your device’s NVRAM before any flashing attempt (using only manufacturer-approved methods)?
The Spreadtrum (SPD) IMEI Tool V4.1 is a specialized utility used to write or repair International Mobile Equipment Identity (IMEI) numbers on devices powered by Spreadtrum/Unisoc chipsets. It is primarily used to fix issues like "Invalid IMEI," "No Service," or "Emergency Calls Only" that often occur after flashing a device or a factory reset. Key Features
Dual-IMEI Support: Enables writing for both IMEI 1 and IMEI 2 on dual-SIM devices. An IMEI is a 15-digit unique serial number
Additional Address Writing: Besides IMEI, it can write Bluetooth addresses, Wi-Fi addresses, and serial numbers.
Broad Compatibility: Supports a wide range of Unisoc/SPD devices, including models from Infinix, Tecno, and itel.
No-Box Solution: Operates without the need for expensive hardware boxes or dongles. Preparation Checklist Before using the tool, ensure you have the following:
Spreadtrum USB Drivers: Essential for the PC to recognize the device in diagnostic or download mode.
Original IMEI Number: Can be found on the device sticker under the battery or by dialing *#06# before the device was corrupted. USB Cable: A high-quality micro-USB or Type-C data cable. General Usage Steps Previous versions (v1
Launch the Tool: Run the WriteIMEI.exe application on your PC.
Configuration: Click on "Mode Config" to select the connection type (usually "Normal Mode" or "USB" depending on the device state).
Input Data: Enter the valid 15-digit IMEI numbers into the provided fields.
Connect Device: Power off the device and connect it to the PC. You may need to hold a specific "Boot Key" (often Volume Up or Down) during connection.
Execution: Click the "Write" or "Start" button. A "Passed" message indicates a successful write.
Disclaimer: In many regions, changing an IMEI number to a different one than the original is illegal. This tool should only be used for repairing the original IMEI on a device you own. Use at your own risk, as improper usage can lead to permanent device damage.