The Hub4 is only wifi5. It will max out at about 600Mbps on a single device - 2 simultaneous connections may get ~500 each, 3 about 330 each etc.
To get faster you need a Wifi6 device. The Hub5 is wifi6 but ironically isnt being issued to 1GB customers - yet. So you would need to get your own kit.
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.