Why does my galaxy s9 plus keep freezing and crashing after i power on

[Android Central Question]

I downloaded an app out of the playstore (accidentally) and now I think my phone has a virus I tried everything factory reset and download an antivirus app and my phone still freezes and crashes after 2 minutes on the phone

 

[B. Diddy]

Welcome to Android Central! Boot into Safe Mode and uninstall that app: https://support.t-mobile.com/docs/DOC-37190. Does it still crash afterwards?