A: "Working" does not mean "safe." Malware often operates silently in the background. Your friend's device might be part of a crypto-mining botnet right now. Because Clean Master has accessibility permissions, a modded APK can literally read everything on the screen.
Avoid using "keygen" tools or "free keys" found on unofficial forums or Google Drive links. These are often associated with: Malware Risks clean master 6 pro activation key
Unauthorized keys may cause the software to malfunction, crash, or be disabled by the developer during future updates. Legal & Ethical Concerns: A: "Working" does not mean "safe