Use 2nd Phone as Signal Booster?

I get hardly any signal in my house. I was wondering if there was a way to use my second Android phone as a kind of Signal Booster instead of shelling out several hundred dollars for one? I get one to two bars if my phone is in the window, but it would be nice to have a second phone up there so I'm not on a ladder every time I'd like to use the phone.
Thanks!
 
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