Lately my Wi-Fi has been cutting in and out and giving me a low signal strength while playing MW3. My service provider is Time Warner and I have Road Runner Turbo. My router is a NetGear N300 (WNR3500L). I was wondering what is a good connection speed and how to test the speeds (Kbps). Anyone who can help me, I'd greatly appreciate it!

Own iMac so if there's a test it'd have to be iOS compatible. Also I have a iPhone 4S so if there's a good app to download as well.