fwiw, I've had completely the opposite experience. I've found the back button a godsend on both WP and Android platforms, and haven't really noticed this unreliability. Actually, as a user I prefer to use my Windows phone over my other devices almost entirely because of a combination of two features: the back button (missing from iOS) and a decent soft keyboard (missing from the Android phone I have, which is running 2.2. I've heard the keyboard in 2.3 is much improved, but unfortunately the upgrade wasn't available for my phone last I checked). There are a lot of things the other platforms have over the WP, but being able to have those two things together is enough to outweigh all of them and ensure that my SIM card stays in my Windows phone 70% of the time ...