I get a message on my Visible R2 phone that says my os is corrupted. I get this message everytime that I boot the phone. I ran Kaspersky on it and it found a ransomware Trojan on it but it did not quarantine the file that has it SDM.apk. I see where it is in the system folder using SD maid . How do I remove it or do I need to reload the stock ROM? If so where should I go to find t?