This article provides caution when installing free apps into your smart phone. You may end up costing you more because your smart phone with all your important data, such as personal details, bank data, etc, has been hacked.
While free apps may be carrying hidden pay loads (i.e. trojans), these nasties may also be found in paid apps. What to do then? Do your research first before installing any apps, free or paid, on your smart phones.