We all know that our 4s can't enable 3g. So do we have any 3g toggle app? Non-JB
If you're jailbroken, there's an app on Cydia that enables the phone to fall back to EDGE if 3G isn't available.
You can use this as a toggle to turn off 3G in the settings so when you launch an app of your choice the 3G would be switched on.
Forgot the name of that app. It was called something like nodroppedcalls 3G or something.
EDIT: google drop call eliminator and you'll see it
Posted via BlackBerry Z10 <-------what good is the Hub without apps?