If your VM network has been switched to the DOCSIS 3.1 standard then yes - just pay more money and subscribe to the 1 Gbps service. Other than that, nope, not on any basis initiated by you. DOCSIS 3.1` is being rolled out across the VM network, and I'd guess it covers around 40% or so of the total customer base at the moment.
Question is, why do you want to "upgrade" your hub? If the existing one isn't performing, a replacement will usually perform no better.
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