This is farther away but in a much open area. Getting awesome LTE T-Mobile speed here than my home:
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It's certainly fast but it seems like actual speeds are falling far behind theoretical. On my my note 3, i was able to get faster speeds than that and my note 3 had a theoretical max of 150mbps, giving me about 90% of max theoretical speeds. On the S8, your speeds, while impressive, are less than 15% of max theoretical speeds