CRTL stands for Control, a security measure specifically for MediaTek devices. The status labeled sec_crtl determines whether the device can boot in BROM (Boot ROM) test point mode. A status of (0) means that the device is inactive and modifications are permitted, while a (1) status means the feature is active and modifications are blocked. Techniques to bypass CRTL status should only be pursued through device-specific forums, as they often require intricate knowledge of firmware.