I seriously doubt 100mb speeds on an iPhone. I have an Ethernet cable plugged directly into my cable modem which is < 1 foot from my laptop. I consistently get 80-85 mbps down and 10-12 mbps up, a far cry from the advertised speeds Comcast touts. Not an issue with my laptop as I get Gig speeds wihen I am in the office. Not an issue with cable modem unless it is something Comcast configured so the problem must be wiht Comcast.
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