So I was recently up at my parents house this weekend, and since I've reserved the new 6s in store, I decided I'd upgrade my mother's phone to my iPhone 6 for her. Got all her stuff transferred over and I have her 5s for a week or so. At their house, I seemed to of had bad reception whenever I visited. Now keep in mind it is usually bad there, however I guess I had it unusually bad without really knowing. Well now that my mom is on my old iPhone 6, she said she's had terrible service throughout the house, and I even experienced it on a phone call with her today. What would you guys recommend to go about fixing this problem? We're on At&t and the 1 year Apple warranty is already up (pre-ordered last year). Is this something Apple even fixes, or not really since its a carrier involved issue? I wish I would have went in during the warranty, but didn't know it was that bad of a problem. I would really appreciate the input!