To those of you going with either skins/wraps or minimal case, is there any that you recommend that provides more grip than the naked phone? I was planning on using iPhone 7 (regular black) without any case/skin but this **** thing is very slippery. So, to not compromise with bulkiness of cases, I'm looking to either go with a skin/wrap or a minimal case; however, after browsing few threads, I have not found one where people have mentioned any case/wrap/skin to be grippy. Anything you recommend?