1. Ramsomware: programs that access to your phone through dangerous applications. Encrypts files so the user cannot access to the app and have to pay to make a rescue.
2. Adware: they are applications that perform phase publicity clicks without the permission of the user so that the attackers obtain benefits.
3. Trojans: they are apps aparently good but when you open the app, the app gives remote control access to attackers to the infected mobile. In other words, they open a back door to the mobile.

• Review the privacy options.
• Be careful with the information you share.
• Do not say personal information on social networks.
• Verify application permission.
• Change your password often.
• Do not save passwords on the website.
• Use common sense to make responsible use of the internet.
• Have a good antivirus.
• Do not download files that they sent to you.
• Buy from trusted online stores.
• Download the applications from their official sites.
• Always keep your computer, your browser, your antivirus and everything in general updated.

-"CACTUS VPN" in English: https://www.cactusvpn.com

-"THE VERGE" in English: 
https://www.theverge.com/2019/9/6/20802082/online-privacy-security-protectionguide-how-to-data-identity-theft-harassment-apple-google-facebook