JB'd 4S. Is there an app I can use to allow me to lock my WiFi connection to a defined router ?. I have a 3rd party (App store) app that I want to have stay connected. At my workplace, when I move around a stage environment, my phone will connect to whichever router (of 3 available) has the strongest signal. I want to stay connected to the router that is on my stage lighting network and not the others. Saves me time when re-launching the app. Thanks in advance. Steve B.