Instead of risking your security with potentially malicious keys, consider these official options:
: Websites offering "free" or "cracked" keys are often traps that distribute malware , including Trojans, ransomware, and info-stealers.
: ESET Mobile Security for Android has a "freemium" version with basic features available at no cost.
: ESET offers a 30-day free trial for its products, which you can activate directly through the software using your email address.