Combining your wallet (or credit cards) with your cellphone, is foolish and personally irresponsible.
I understand the idea of consolidation and easy access. But phone snatching is so prevalent these days, because of how mindless phone droning makes people unaware of their surroundings. You're basically just including your ID, credit cards, etc into one neat little package.
I agree. I liked the combined version for six months, then realized that losing one but not the other meant I could still get home. I've only lost my wallet once in the last ten years, but when it happened, I was able to call the restaurant and get a Lift back there to collect it.