As of 2026, you can watch the remastered version of this South Korean masterpiece on several major platforms in India: Amazon Prime Video India : Offers the film in
As for the availability of "Oldboy" (2003) with dual audio and patched, it's possible that fans may have created and shared modified versions of the movie online. However, I couldn't find any official sources or reputable websites that offer a patched dual audio version of the movie in Hindi and Korean. download oldboy 2003 dual audio hindikorean patched