On computer, drag the image into a new tab and it'll show as:
https://i.imgflip.com/2itnlp.jpg
Get rid of the "i." and ".jpg" and add an "i" between the .com and url, like:
https://imgflip.com/i/2itnlp
Put slashes between the i.
On your phone, you just tap and hold an image, and tap to copy link. Paste the link in the browser, and do the same as on a computer and it works.