Hard resetting a device with a compromised file system can accidentally format the security sectors.
The device NVRAM partition may be heavily corrupted. You must first flash a clean, compatible firmware ("Scatter" or "PAC" file) onto the device before running the IMEI repair sequence again.
Preferably running Windows 7 or Windows 10 (with Driver Signature Enforcement disabled). coolsand rda imei repair tool
Before diving into the repair tool, it is essential to understand the manufacturer. (acquired by Spreadtrum, now Unisoc) was a fabless semiconductor company that designed baseband processors for low-cost mobile phones. Their chipsets were widely used in:
A corrupt or invalid IMEI (International Mobile Equipment Identity) on a mobile device cuts off all cellular network connections, transforming a functional phone into a brick that cannot make calls, send texts, or access mobile data. For budget feature phones powered by Coolsand or RDA microelectronics chipsets, addressing this issue requires specialized hardware or software interfaces. Hard resetting a device with a compromised file
Disclaimer: Changing an IMEI to a number other than the one originally printed on the device's battery label is illegal in many jurisdictions. Always restore the device's original IMEI. Step 1: Install the Required Drivers
While holding the key, connect the phone to the PC via a reliable USB data cable. Preferably running Windows 7 or Windows 10 (with
Even with the right tools, you might encounter issues:
Allows users to manually input and flash the original 15-digit IMEI number onto the chipset.