Hello,
Visit http://www.jeemain.nic.in and click on download jee mains admit card link.After it, login into the account using your application form number and password that you had earlier selected during application form filling.After it you will be able to see your admit card and hence you can download it for future use.
Good luck.

Go to cyber cafe and ask them

Visit jee main official website http://www.jeemain.nic.in and just by providing your basic details you would be able to download jee main admit card.

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