What is the best anti-virus app?

I'm using Lookout Premium, haven't tried out AVG or other vendors... So far only 1 case reported by Lookout that a website was suspected of malicious content... Btw, you've to use the native web browser, not others like Dolphin...

But one general limitation I notice across all mobile security apps is that they do not scan/detect virus or malware in email attachments of Gmail or Yahoo Mail...

May not be the full scale of a PC virus but some malware have been reported in smart phones before, esp. Android phones. Just think of smartphone as a very small computer that can make phone calls and SMS... They still run on operating system that evil-spirited souls can exploit and write malicious codes. The possibility also applies to iPhone but just that Apple is very protective of it's eco-system so iPhone is much less likely to be infected.... This is an area I always think Google and the Android phone makers need to improve upon....

i see  shall install one then... thnks esiew