Antivirus or no Antivirus? Useful or Not?

There are two antivirus apps that you can download on this site. AVG PRO and Kaspersky premium (all paid apps, just search on app tab).

What good does it do?

Basically, we all know that this apps protect our SGY phone (samsung galaxy y) from being infected with malicious files that we download everyday. Files from untrusted sites of course. It helps clean the phone if ever it gets infected. Question is, Is this true?

Since SGY phone is made out of the linux platform, it really is hard to penetrate. Studies show that linux systems are almost impenetrable to viruses or malicious files than most phones that are not based on these system. In fact based on experience, I have never heard of a galaxy y phone being "infected" that seriously. Well, who knows.

Another factor is that, antivirus apps consume more battery life. It consumes 50% of battery life while on stand-by mode. It also makes the phone lag a bit since it is running even if you can't see it. It also lags start-up time since it takes a while to load.

Whether you decide to install or not, i'ts better safe than never right?