How can protect the mobile phones from being hacked?

If you keep the mobile phones safe in your pocket or purse, it's still at risk for picking up a virus or leaking data to thieves. Hackers don't need physical access to your phone to steal your personal information or infect the device with malware. They infiltrate your phone with innocent-looking apps or link to it via unsecured Wi-Fi networks. A Technology blogging site that provide you price in bangladesh of all mobiles talking about this problem. Before some days I take my new phone from online shopping site . Some informative site also provide disadvantage of hacking. Now I want to know how can protect my mobile phone from being hacked?