: In some feature phones, the tool can read the existing unlock code without deleting user data.
Most Coolsand formatting tools are legacy software designed for Windows 7, Windows 8, or Windows 10. While they can run on Windows 11, you may need to run them in "Compatibility Mode" or disable "Driver Signature Enforcement" to install the necessary drivers.
Understanding the tool's capabilities will help you diagnose whether you actually need it.
The Coolsand Format Tool is a small utility designed to low-level format specific Coolsand/Spreadtrum (now Unisoc) chipsets, often found in older Chinese feature phones, some early Android devices, and USB modem sticks. Its main purpose is to erase user data, fix IMEI corruption, or recover dead devices by clearing corrupted NAND/NOR flash partitions.
You might wonder why a simple factory reset via the phone's menu isn't enough. There are specific scenarios where the Coolsand Format Tool is the only viable solution:
Alternatives like the or Spreadtrum Upgrade Tool have taken over for newer hardware, but for pure Coolsand silicon, nothing else works.