: The ability to browse, download, upload, or delete files on the victim's phone. Data Exfiltration

: Use reputable mobile security apps to scan for Trojans.

If you're interested in for your own devices, I can recommend secure, legal alternatives.

: It can survive device reboots and sometimes even intentionally crashes the device if a user attempts to uninstall it. Official Channels and Evolution

Install a reputable antivirus app that can scan for hidden RAT signatures.