(Master Subsidy Lock) to move a device to a different carrier. Firmware & Data : Facilitates flashing firmware, reading the , and performing full backups and restores of device data. File System Access
: Navigate to C:\Program Files\DFS\Drivers and run qcldriver.exe or Samsung_USB_Driver.exe . Reboot after installation.
High-shielding USB 2.0 or Type-C cable to eliminate data transfer noise Microsoft .NET Framework 4.0 or higher installed on host PC Operational Workflow: Connecting and Editing
While CDMA technology has since been largely superseded by GSM, UMTS, and 4G/5G LTE standards, a significant number of devices from this era—including older smartphones, USB modems, and industrial communication hardware—still rely on CDMA for their operation. The DFS CDMA Tool version 3.3.0.7, developed by the DFS Team under Telecom Logic group, provides a professional, automated solution for working with this equipment, performing tasks ranging from simple data settings modification to low-level memory and file system access. Dfs Cdma Tool Ver 3.3 0.7
Provides tools for deep interaction with the device's FS, EFS2, RAM, and EEPROM. Automation:
Before version 3.3.x, retrieving a phone’s 6-digit Service Programming Code (SPC) often required risky manual memory dumps. Version 3.3.0.7 introduced a more reliable "Universal" and "Brute Force" method that could unlock 90% of Samsung, LG, HTC, and Motorola CDMA phones in under 30 seconds.
Install the specific matching the computer's architecture. Operational Workflow (Master Subsidy Lock) to move a device to
Compatibility & prerequisites
[Device in Diag Mode] ➔ [Connect via USB] ➔ [Select COM Port] ➔ [Send SPC/Password] ➔ [Read/Write NV Data]
Basic workflow
Switch the device to (Diag Mode) using carrier-specific dialer codes (e.g., ##3424# or ##3282# ).
: The application permits direct reading, editing, and uploading of Preferred Roaming List ( PRL ) binaries. Updating the PRL allows Legacy CDMA devices to lock onto the correct cell towers and update roaming configurations across different regions.