How search for similar images in the phone?

I am looking for an equivalent functionality that is available on the desktop Google Search page: upload an image and search for similar ones. Unfortunately once Google recognizes that I am on the phone, search with image gets disabled. I also tried with DuckDuckGo.com but again I cannot find this option that is readily available once I am browsing on the desktop pc. Can someone recommend a search engine that offers image search on the mobile? Or alternatively simple way to fool DuckDuckGo or Google to let me search with image...