The Porsche Design Huawei Mate 20 RS is an expensive smartphone. Huawei’s Mate 20 Pro looks like an exceptional phone, so can a version with Porsche Design’s involvement be worth spending twice as much on? We’ve taken the phone for a test drive, and enjoyed cradling the leather-clad case in our hands; but does it go deeper than that? Let’s take a look in our hands-on review.