Chinese Backdoor Checker for Android
This app may detect malware embedded in the phone but it doesn't say what it is, where it is or offer any advice about how to get rid of it. Pointless.
It doesn't help if your phone is infected (it just tell you that it is, but no more info)
Useless
by Y####:
Found the Adup backdoor, had to root the phone and remove it with Debloater tool