While using an android phone, the biggest drawback that I have encountered is that there is no privacy for personal content (at least by default). You do not have any option to lock a particular folder or an application. The only option is to lock your phone as a whole.
Thus if your phone is left unlocked then anyone can access your any applications such as messages, contact, etc.Thus if you also want to protect some of your phone content from friends or family members, now you can do so by encrypting and applying a password to your content. You might be thinking that there is no such option present in our android phones but then too you can be do so by using a third party application.
NQ Mobile vault is what you need. This application allows you to hide your private text messages, photos, videos, private contacts and call logs safely. All you have to do is just download the application from the link given below and run the application.
For the first time when you will run the app, you will be required to setup a desired password and confirm it. After this you will be shown a list of applications from which you can select the applications that you want to hide. Once you select the applications, tap on “Import” button.
NQ Mobile Vault is an easy to use application that is available for free in the Google play store. However if you want to increase the storage capacity of the app so that you can store unlimited text messages or so, then you can purchase premium version for $1.99 USD per month. The app requires android 2.0 or up to run.