I'm sure we've all been there. You see an open Wi-Fi connection and connect to try to save data from your cellular plan. Unfortunately everyone around you has the same idea and the connection slows to a crawl. If you haven't experienced this, consider yourself lucky. Clearly enough have as Apple has added an option for apps to default back to the 3G connection if the Wi-Fi isn't working.
The new feature is a godsend for some and not a big deal for others. If you're anything like me, you want your e-mail and you want it now. When the option is enabled, some more important apps that have trouble communicating through the Wi-Fi connection will automatically switch back to the cellular network until the problem is resolved.
These apps that are capable of using this feature, as of right now, are iCloud Documents, iTunes purchases, Passbook and Reading Lists. Furthermore, the feature will attempt to keep FaceTime video calls from dropping on the iPhone 4S and above. It's not clear, as AppleInsider points out, just how the cellular companies will react to this.