Handmade phone cases: great for beginners and leftover yarn, too

Dear users, dear authors,
even beginners can use leftovers / leftover yarn to make delightful phone cases by hand. Here in this thread you’ll find patterns that you can download and make right away. Have fun with your quick successes. 

@Authors,
2-3 patterns per author are enough. Don’t forget links, images, info, etc. All patterns advertised here must not have been advertised in the forum in the past 3 weeks, must have at least 10 sales and a CR of at least 3%.