Perfectly fine for 5GHZ but WiFi simply DOES NOT WORK for devices that only do 2.4 GHz. I have yet to get to the bottom of it but I suspect it's interference - we live in an area with dense housing - coupled with their latest inexplicable decision not to allow the channel to be changed on the WiFi router. Whatever the reason, check your phone and if it's 2.4Ghz WiFi only, beware! Talktalk worked brilliantly so go with them.
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