I am using Kaspersky Internet Security for my android phone and I am very happy with it. The following are some features of this software which makes it a must have:-
1. It it free, tough one can purchase it’s premium version which will give them some additional features.
2. It has anti theft protection for smartphones free of cost.
3. It’s interface is very simple and it runs smoothly without tampering with my phone’s performance.
4. Scanning is very fast.
5. Free trail of premium version before purchase.