How to extend wifi signal for use with smartphones

  mustdav 17:59 30 Nov 11

I currently use BT Homehub via ethernet to my PCs upstairs but I want to connect my smartphone downstairs to the internet via wifi. Unfortunately the walls are too thick for the signal to be received downstairs. Can I use powerline via my house electricity circuit to solve the problem? If so which ones and do I need new routers??

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