I added a side pocket on my brother's T-shirts for holding his phone. Cut up a couple of T-shirts and cut out pockets after making sure the first one worked well. The first one took about 1/2 hour. The rest about 5-10 min. each depending on how many cat interruptions I had. Just make sure it's deep enough that the phone won't fall out if you bend over to change a tire. And yes... he had to do something for me in exchange.
