You can't make just one! It has taken me a while but over the last few months I have been working on zippered pouches. There is always one more tweak to make so that it is the perfect bag, though I have become reconciled to it never being completely set in design. I started with wanting to add an outside pocket to keep phone for handy use.
The back would have some design feature. In this case a panel from Australian inspired designs.
I moved on to a clear pocket out of plastic table cover. This stuff is great as you can see the phone face thru it and even work some of the buttons. I have even answer the phone still in the pocket and reply to text. I have had to change the size of the pocket. A lot of phones are getting bigger and so the bags have grown too.
Here is one with the pocket a bit larger. I had feedback from friends that once the phone was in the pouch then nothing would fit in the inside so I have been working on added depth. It is a bit tricky with the plastic. I will post tomorrow with more pictures of my adaptions to solve this.