Extend the Wireless Router Signal

My cousin moved into a new house.  She has cable internet and a wireless Linksys/cisco router (I forget if the modem is built in or separate or what model the router is).  The router is only capable of 2.4 GHz.  She isn't getting a strong enough signal in the part of her house farther from the router.  We tried using a repeater.  We put it on the front porch where it had full connection strength to the router, but when we went only 5 feet away from the repeater by going into the living room the signal from the laptop to the repeater became too weak.  We also tried changing the router's channel from "auto" (the default) to specifying different channels to see if any of them would work better, but still no joy.  What could we do to get a strong enough signal throughout the entire house?  Would a dual band router work better using the 5 GHz frequency?  Could she connect another modem/router to a cable jack on the other side of the house and use it at the same time as the original router is being used without the router's interfering with each other?  Are there better repeaters?  Are there repeaters that that could connect to the wireless router at 2.4 GHz but then allow a laptop to connect to it at 5 GHz?  When routers are simultaneous dual band, does that mean that a laptop will automatically switch between 2.4 and 5 GHz, whichever works better, or does that mean that some devices could use 2.4 GHz at the same time others are using 5 GHz?
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Declan_BasileITAsked:
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MontoyaProcess Improvement MgrCommented:
Hi,

Most of this depends on interference from walls, signals, etc.. also the capability of your router.
Depending on the size of her house, I would upgrade to an AC type router.. it has increased range over all other legacy specifications. The triple band Netgear Nighthawk X6 is basically the best in class. It's pricey, but it should cover your entire house and used 3 bands.

Your other option is an access point. If you want to go that route, then you would have your setup in the following way:

Modem
Router attached by cable to modem
Access Point in a new location with usually poor signal.. attached to router by cable
Access point delivers wireless signal to that area
router delivers wifi signal everywhere else..

for the price, however, the first suggestion will probably give you all you want, plus that router has additional features like VPN into your home, for example.
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Declan_BasileITAuthor Commented:
Thanks
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