I have been a virgin customer for 15 years and never had a problem. I have moved house and not only got a fraction of the speed but routers that just drop WiFi out for days at a time. After a 4th call to bt this time I get a new router. My dad is on his second one in a year for the same reason. Are these refurbished junk because they are appauling WiFi reliability wise. Hard wired no problems whatsoever but with two mobile phones, tablet and a fire stick it isn't ideal. I'll chuck bt in completely next time it goes and go to a cheaper isp and see if I can purchase something more reliable.
have you tried splitting the 2.4/5ghz networks to see if that helps your wifi as many devices don't like them combined
have you turned of smart setup
have you tried selecting the wireless cahhnels manually rather leave on auto?
have you tried chaanging the wireless mode from 1 to either 2 or 3 to see if that helps
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