I've been having issues for few months and even connected ethernet cables for 2 connections upstairs which is not ideal. Wifi drops out intermittently on mobile devices. Have done wholesale speed test which shows results > what I am actually getting.
If you are going to purchase a replacement you'd be better off getting a third party router.
@MsBkl This one works just fine, and has good wireless range .
TP-Link TD-W9970 for about £40 or less.
A good set of features http://uk.tp-link.com/products/details/cat-15_TD-W9970.html#specifications
I have a new hub and find the range and coverage better overall than the more expensive tplink vr2600 with 4 external aerials however the tplink certainly has better features than the hub
Thank you for response. What would be the benefit of going to third party hub?
Full control over how you configure the router, without any unwanted interference from BT.
Lots of extra feature which are not present on the home hubs, like a guest network and bandwidth controls. Also the ability to turn off wireless to a schedule.
Not all third party routers have this, but the one I mentioned does. Read the specification, and if there is any aspect that you need explaining, I have quite a lot of extra information on my website.