Product review (1 stars): I accidentally reviewed the F as the bad one, it's this one
I accidentally reviewed the F as the bad one, it's this one, the 3G that does NOT fit the fridges. The F one is still good. This one has a completely unmatching lock mechanism that we could not get to work despite the claim on the page that while the box was mislabeled it would still work. It does not,  and we had to return it, the first one after buying filters several times from Amazon for our Samsung, that started with the 3A and 3B models