Not getting full bandwidth

[wtimm]

Signed up for the 600 Mbps plan, we have the Arris SB8200 and a Netgear R6220 router. On a good day, I may get between 150 and 200 Mbps down and between 15 and 18 Mbps up. Connect laptop directly to modem to bypass the router, but same result. Any suggestions?

[EG]

Try calling 1-800-comcast and ask a rep to completely remove the modem from your account and to "re-provision" it from scratch. Also ask them to confirm that the provisioning and account data in their database is correct and complete and that the correct configuration / bootfile for your subscribed to speed tier is being pushed to the modem.