Hello! I have searched everywhere for a solution and would like to attempt to diagnose this issue first before replacing my wife's iPhone 5. A few people from random Google searches have had this problem, but no solution was found. Problem: When iPhone 5 is connected to home network, Wifi speed slows DRAMATICALLY. I have already determined her phone is the source of the problem. I have 5 other devices connected and have turned them all off/on separately and the iPhone 5 is the only one that slows down the connection. Right now, I have 5 devices total connected to my wifi and my speed is normal. Her phone has wifi turned off. Specifications: Motorola SBG6580 (Modem/Router) Router turned off. Linksys N900 Router iPhone 5 32GB iOS 6.1 (Been having problem since she got the phone with iOS 6) I have tried: Turning modem/router on/off several times Rebooting her phone several times Restoring her phone Turning on guest network and connecting only her phone to it Directly connecting PC to router I would appreciate any and all suggestions, sans calling my ISP and Apple, as I have already done this in the past. Thank you in advance!