Does anyone use anti virus for their mobile phone?

i'm guessing your talking about android?

if you have 3rd party app installs disabled in your security settings and you install all your apps entirely from the google play store, then you probably don't need antivirus as google play scans all apps for malware etc.

however if you're installing 3rd party apk's etc....then there might be some merit. 

antivirus apps use alot of juice

I used to use avg on my  last Galaxy note . Does good and  it's cheap.  A subscription  is like 7.98 a month or something  like that.

No lol