I have a similar issue. I purchased the 175 Mbps package about a month ago, and have never broken 98 Mbps - wired or wireless.
I upgraded my Modem to an Arris Surfboard SB6183, a DOCSIS 3.0 cable modem capable of Mbps.
I alos upgraded my wireless router to a Netgear R6080 AC1000, capable of 300 Mbps + 700 Mbps.
Lastly, I upgraded my cable from the modem to the router with a CAT6, so it can handle speeds above 100Mbps.
Still doesn't seem to go any faster than 98Mbps (at best and is often more like 40-80 Mbps).
Appreciate any help.
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