should I be comcerned?

[First names A Verb]

I bought the s6 active a couple weeks ago and it's great. I tested the water resistance briefly and it's fine. However I've noticed that the plastic casing moves slightly on the lower sides of the phone. It doesn't seem broken and I haven't dropped it or been rough at all with it so I'm a litte suspicious about its integrity. I'm planning to stop by best buy where I got the phone but is there any advice as to whether this would compromise the phones water resistance? It doesn't seem like it would have a good seal if the casing moves around on it.

Thanks, Chase

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