second photograph shows a revised edition, witch looks a lot "cleaner".
More photo's and remarks on several steps marked: "extra-extra, second edition"
Step 1: You will need
old t-shirt or other crap of soft textile
piece of hook and loop
Step 2: Back side
Mark out the lenght of your phone. The remaining part of the backside will become flap and can be finished with a zigzag or decorative stitch. Notice that I made the flap a little less wide to correspond with the measurements of the phone ( 7 cm in my case).
Extra-extra, second edition:
Notice photo 4 and 5
Using a bit bigger tube I only needed two pieces witch I cut with extra seam. Stiching is done with a simple straight stich. On the end of one side I added a rim, cut out of another piece of tire