**6. Conclusions**

During the comparative study of mobile cellular operating systems: Android and iOS, it can be concluded that: iOS is more secure compared to Android, due to the restrictions and security mechanisms imposed by Apple. Otherwise, computer virus infections in mobile phones are not very worrying at the moment, but other cyber attacks, spyware that captures confidential information leading to a remote server, that is, even geographically distant, it monitors all user information to take advantage. Meanwhile, we can cite three forms of attacks: the attack is done by identifying the victims online, in industrial, and lastly by targeting them individually. However, the carelessness of users in information security, such as social engineering, attacks on banking data, cloning of credit cards, and the installation of software outside the play store, appstore, and itunesstore are the biggest concern. For this reason, it was necessary to propose information security policies: the greatest care with passwords;

for WiFi technology the modern WPA encryption is recommended; installation in Noroot firewall; use: the Privacy Badger tool to block unsafe sites; the Panopticlick specialist in web testing, VeraCrypt to encrypt important documents and in the case of telephone calls the Signal application that encrypts the calls prevents anyone from listening to the call made.
