Leo Privacy Guard application is free and lightweight making it convenient to download and easy to use. It is also packed with features that enable users to lock their apps, set privacy levels by deciding when to lock and what to lock and hiding files that you don’t want exposed to other parties.
Lots of smart phone now a days selling in international market from low cost to high cost. But you should consider that phone which have high RAM, inbuilt space, fine processor and good capacity of battery.