This is how I do a reverse image search from my phone or PC

Dragging an image from your desktop directly into the website's search bar. Copying the URL of an image on the web, then ...
The Droid Guy

How Can I Use Bing to Search for Images

Go to the Bing Images page or select the Images tab at the top of any search results page. In the search box, click on the camera icon. You can drag an image from Bing, another website, or a file on ...