I need to structure the response to first explain the typical methods people use, then discuss the risks involved, followed by official alternatives. Making sure the language is clear and not too technical, but still thorough. Also, keeping the tone helpful and concerned for their well-being, not just listing facts.

Wait, should I include information on how to report suspicious apps? Maybe. If the user wants to contribute to preventing others from falling victim, reporting the app to the relevant app store or Garena itself could be useful. But the main goal is to inform them of the risks and provide safer alternatives.

Also, maybe highlight that some legitimate ways to get free diamonds exist, like checking out the Garena app for promotions or using a promo code. These are safe and within the game's policies.

Additionally, it's important to direct the user to official resources. If they accidentally downloaded a harmful app, advising them to uninstall it and check for malware is prudent. Emphasizing the importance of using trusted sources for downloads and reading app reviews can help prevent future issues.

I should make sure the conclusion reinforces that while the idea of free diamonds is tempting, the risks outweigh the benefits. Encourage them to support the game developers by purchasing diamonds legally when possible.