Put a wireless router at home, there should be enough strength signal everywhere in the home (if you say your big BT downstairs upstairs each floor area of more than 150 then I suggest you lay two routers...)
You can buy a wireless router to dial up and provide routing services for the device, with WIFI function of the wireless router online price is not expensive, a brand is not loud is more than 100, good point below 300 enough, mainly reflected in the stability, signal distance, signal strength and other aspects, but regardless of the price, it can be used. It's just the difference between a stable signal and a long distance
Wireless routers have several (generally 4) types of wired interfaces, if your home is a machine, you choose a wireless router with a wire port, such as alpha, on the line, the machine is connected to the router, the mobile device is connected with WIFI, the distance is at least ten meters indoor distance, generally almost a little quality within 30 meters