Dont think about it.... get the Hub3 reactivated onto your account and send the Hub5 back. You are in effect beta-testing it for VM as it isnt on general release yet.
Call the activation line on - 0800 953 9500 (option 3) – you will need the serial number/MAC address off the Hub's barcode sticker and also your account number,
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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.