I think the most perfect phone at the launch was Lumia 920. Had everything any other phone could even imagine. Pureview camera and OIS, those impressive low light capabilities in photos and videos, 60 Hz screen for smoother scrolling, 3 HAAC mics for rich audio recording, wireless charging, super sensitive touch screen which can be used with nails as well as gloves. It even later got glance and double tap. I think, really a perfect phone and unchallenged king of it's time! Though there was no SD card slot, but I think that was for a reason. Lower class memory cards can really slow down the performance of playing music or videos, or recording videos directly to SD card. And I think 32 GB was enough at that time. Also, we can't forget the differentiating colors it came with. I think it showed such a beautiful and smart wave of phones to the smartphone world. That was game changing and something to really excite for. Nothing such happened with 930 or this 830.