Going out to a different country to acquire specific skills and knoledge is trending but going abroad without any particular objective may turn futile.
There are high chances that you are not getting calls because you don't have the required skills, have a resume that is not pleasing enough or you have mentioned incorrect contact details.
Internships have gained a huge popularity a last few years as they cary multifarious benefits apart from enhancing your Resume.
One's career journey is a long period and often requires a lot of documents the most common and useful one being Resume.
Both Resume and Bio-Data serve different purposes; while a resume is most acceptable and commonly used document for applying jobs, Bio-data is used in India primarily for job purposes. It depends upon the candidate to choose a format as per his/her requirements.