Product review (5 stars): Does not fit Samsung fridge **Found fix!**
This did not fit my French door Samsung fridge even though it claims the same part number. They appear the same size and shape but the tabs that screw into the fridge at the top are clearly different.

Update: I found this advice on a review of the brand name filters to another site. I followed it and the filter now fits.

When you remove the old filter (which can re-installed okay), you must keep a significant amount of pressure Up on the filter when you unscrew it all the way. This insures the collar tabs are completely reset. Then when you install the new filter, you also need a good amount of pressure on the new filter when screwing it back on.