Apple's first foldable phone has arrived, and if you've decided the iPhone Duo is the handset for you, you'll want to get a case organized sharpish. The unique proportions mean not all of my favorite case-makers have their Duo cases sorted just yet — however, there are still plenty of excellent covers that are are available to buy (or pre-order).For a phone this high-spec (and pricey), I'd definitely recommend spending a bit more and sticking to known brands for your case. Below you'll find recommendations for the US and for the UK, from Apple direct, as well as via trusted brands OtterBox, Spigen and Mous. I'll update this guide as more options become available, but if you have your Duo on its way now, you won't want to wait.Foldables not your thing? Here are the best US iPhone 18 Pro cases and the best UK iPhone 18 Pro cases, for Apple's new flagship.Apple iPhone Duo cases — USIn the UK? Hop to the UK case picks Apple iPhone Duo Folio With Kickstand – Navy Blue iPhone Apple iPhone Duo Case – Sand OtterBox Lumen Series Case, Clear Spigen Air Fit Pro Case, Black Spigen Tough Armor Pro Case, Metal Slate Mous Super Thin Aramid Fibre case, Black Spigen Tough Armor Pro Case, Black OtterBox Defender Series Pro XT Case, Black Spigen Slim Armor Pro S Case, Black Apple iPhone Duo Case – Navy Blue Apple iPhone Duo cases — UK OtterBox Defender Series Pro XT Case, Black/clear Apple iPhone Duo Case – Navy Blue Apple iPhone duo folio With Kickstand – Taupe Spigen Tough Armor Pro Case Mous Super Thin Aramid Fibre case, Black Spigen Slim Armor Pro S Case, Black Spigen Nano Pop Case OtterBox Lumen Series Case, Clear Spigen Nano Pop Case