My 2 cents; I would actually perfer to have the hard phone keys be locked all the time during calls. I almost always use a headset so the phone is usually in my pocket. Using the "basic" OnLock program I have at several occasions either sat down or bumped into something just right to hit the end key while on a call. Perhaps once you figure this out you could make it an option to lock all keys during a call or not. Just my opinion, great work.