Hello all, new member here.
I was just wondering if I could use my old sky Q ER115 router for anything. I've just had sent to me a new SR203 router because I complained about the signal I get upstairs and further parts of downstairs. I've searched the internet and there is talk of flashing routers with DD-WRT firmware to connect two routers together extending the range of the primary router. I must point out that I am not technical and most of the stuff I've already read is like another language to me. Sky now tell me because of the plan I have, if I can't get minimum 3Mbps in all the rooms of the house they will send me a booster, if that won't work they will send an engineer out to look at it. 3Mbps is still a bit too weak to stream, any suggestions?

Thanks for looking,