Phone Sling - The Vegvisir
Here’s my latest phone sling!
Made in oiled cotton (Barbour-type fabric) and lined in plain cotton, it is embroidered with a Vegvisir and finished with brushed brass hardware.  It also has a long, adjustable strap in toning seatbelt-type webbing. 
The Vegvisir is an Icelandic magical symbol, also known as the "wayfinder" or "signpost," believed to help those who carry it find their way, particularly through difficult conditions like bad weather
These slings are just so useful!  There is a roomy main compartment for your phone and a concealed pocket inside at the back,  ideal for a couple of cards and some folded cash.  The front pocket is also (I noticed this today) great for a passport.
Although roomy, the bag can be worn snugly under your jacket and across the body in front of you - especially useful when riding (horse or motorbike) or cycling.