I want to persue a job for R&D department of mobile companies. What qualification is must accordingly?

Hello,

For getting into mobile development you actually require some sort of computation basics or repairing basics. If you have done any course related to computing in your academic level, you may idea on that. But if you have not don't worry you can join certificate course. Certificate courses are available in many areas including that of mobile development. You want to choose in which area you want to work. Then choose the course that you should study. It is good if you have knowledge on programming language especially Android or Java.