If you love the film, buy the Blu-ray. The and the US release by 5Points Pictures (now out of print but available on eBay) come with verified, high-quality English subtitles. This is the only 100% future-proof method.
The search term provided indicates a request to watch the 2012 South Korean disaster film (Ta-weo) with English subtitles. thetower2012koreanmoviewatchonlineengsub verified