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MoKo via Amazon has various iPhone iPhone X/XS, XS Max & XR Phone Cases on sale when you clip the Coupon on their product pages. Shipping is free w/ Prime or on $ 25+ orders.
iPhone XS 6.5" Crystal Clear Case
https://www.amazon.com/MoKo-Compa…07FZZM3
iPhone XR 6.1" Crystal Clear Case
https://www.amazon.com/MoKo-Compa…07FZXPC
iPhone X/XS 5.8" Crystal Clear Case ($ 3.99 – no coupon needed)