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I think that it's about the same as an average WiFi connection. Compared to 3G, LTE (or true 4G for that matter) is much faster. I may be slightly off here, and it obviously varies with which network you are on, network congestion, etc., but for download speeds, I'd put it at about 2 mbps on 3G, 7-10 mbps for 4G, and 10+ mbps with LTE. I'd count on those LTE speeds decreasing as adoption increases. You can compare that to your own Wi-Fi connections, but the Wi-Fi connections that I most often use range from 1.8 mbps to ~10mbps. There are many variables in all of these numbers, and for the most part probably just reflect what can be expected in my area (except for the LTE numbers, which I pulled off Google), but hopefully it gives you some standard of comparison.