A lot of the problems can be solved by not using the supplied router that is usually cheap and past it's use by date as technology has moved on to get the best from any ISP you need to be able to set up a router which is a step beyond the plug and play solution most people are comfortable with
Most Wi-Fi routers are limited by the antenna that is supplied or built into it, if the router has a detachable antenna then changing it to one with a higher gain may / will / should improve connectivity depending on radio propagation, the building structure and other wireless equipment causing co channel interference , for routers that have built in or non removable antenna(s) then the options available are to use an alternative router or to install a wireless repeater.
We do get occasional loss of TalkTalk network connection but it always seems to be when the heavens open and it really pishes down. An almost daily occurence in t'North East. Although we've done quite well as of late!
My wifi worked perfectly for ages untill one day it just started slowing down and dropping out, spoke to next door and they had just got a new router. Turned out they were on the same channel as me and so were 2 others.
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