If you don't know where the app is, a factory reset is the safest way (I'm assuming the phone is not rooted, so it cannot be installed as a system app).
The other thing is to know how it got there, so you can make sure it doesn't happen again.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.