Check services like for the original English version (with optional Hindi subtitles).
You can legally stream or download the original version of the movie through the following official services: 500 Days Of Summer Download Hindi
You can rent or buy the digital copy, though this version is also only the original English Available for rent or purchase in high definition. Check services like for the original English version
While India does not have strict jail time for individual downloaders yet, the Department of Telecommunications (DoT) actively blocks these sites. More importantly, you are stealing intellectual property. The filmmakers and artists do not get a rupee from your download. More importantly, you are stealing intellectual property
You can stream 500 Days of Summer through the official platform in India.
How to check for Hindi audio or subtitles
Searching for a Hindi dubbed version of (500) Days of Summer