They're not quite getting the incredible speeds we're seeing in New York City on our LG Nitro HD (see picture above) but Engadget is reporting that the carrier's LTE network is live in downtown San Francisco right now. We're not sure whether it's a soft launch or just a preliminary test — we reached out to AT&T minutes ago — but you can help us figure out how widespread the network is by contributing your own reports. Feel free to post your speeds in this forum post, or in the comments below!