Works with a slim case, but the macro lens is non-functional

The macro lens works only about 10% of the time, which is a big disappointment (without a case on the phone... it just isn't a functioning lens). The rest, after a couple of months of trying, were very disappointing as well, even with a very slim case on my iPhone 7. A couple of them get black edges/corners effect quite often that can't be removed no matter how carefully you place the camera (even without the case). Mostly, they're just fuzzy, even when attached without a case. Really, really not worth the purchase.

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