I have decided after a long search for this bag. As soon as I got the iPhone 4S, I have slipped the envelope without problems over. Within the last 40 days I have the envelope never, really never taken off. There has never been a need for this, since the shell (for now) for me had no restrictions result.
I do not use display foil. In my view not necessary with this envelope.
I can recommend the sleeve fully.