So I have an lg optimus l70 (garbage, I know) and I got a virus from a source that I do not remember. This is a Trojan that keeps putting a file called 5supdate_6.apk on my phone, which after installation requests admin access to lock my phone, and CM security freaked out over it so I uninstalled it. I also can't log in to half of my accounts, such as my google account and snapchat, so I have to use a 3rd party app downloader to get my apps. Avast, cm security, and Malwarebytes cant seem to find any viruses, so I have no idea how to remove it. Any help would be great, as I do not want to have to buy another phone. Thanks!