See this
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Firstly... Can we check… are the issues only evident on wifi connections or do you see them at the same times on devices connected on ethernet cables? If you don't know, can you check to help diagnose whether it is just a wifi issue or it could be network connection/Hub related?
On wifi - is it generally true that the further away you are from the Hub the worse the issue?
What Hub model is it and what package are you on?
What are the various Hub lights showing/doing when this happens if a Hub3 is the base light a steady white(ish) or flashing green?
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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.