I have a Hub One and Fibre Broadband and regularly get about 7Mbps download and about 0.5 upload speeds (I'm a long way from the exchange or even the street cabinet - so I'm not complaining about this, at least not today).
Although this speed is considerably better than my previous supplier before May 2107 (T**k T**k), the connection within the house is not as, ahem, strong and stable as it used to be. On mobile devices particularly, it often drops the connection and I just have an exclamation mark next to the WiFi icon. The router is at one end of the house and there are a few thick walls but the connection is noticeably weaker and more unstable than it used to be. I've got a wifi-extender thingy to stretch things to the end of the house furthest from the router.
I've looked at some of the other threads on here and to be honest am a bit overawed by the technical knowledge on display. My question is: is there something SIMPLE I could do to try to improve the situation? Is it to do with the router? Just assume I know nothing about how the router etc works and you won't be far wrong.