Furthermore, the SamFW exploit was also criticized for its instability and potential to brick devices. Some users who attempted to use the exploit reported that their devices had become unresponsive or had even suffered permanent damage. This risk was too great for many users, who decided to wait for a more stable and reliable exploit to be released.
Using the ADB mode for CSC changes may fail on some devices; users have found more success using the MTP mode instead. samfw running exploit fail