Be aware that VM now supply “wifi Pods” (no longer doing “boosters”). Pods are only free to customers on 1GB, Ultimate Oomph or Volt packages - is that you?
If not… you will be charged £5/month. Its a simple solution and should work for you. However, you would soon pay off that cost by buying a "better" wireless solution that will be yours to own and use forever
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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, 2 on WiFi) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's & TP-Link Archer C64 WAP. On Volt 350Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.