Glenn Fleishman joins Macworld’s Dan Moren and Lex Friedman in this podcast to talk about iOS 6 quirks, including what appears to be a bug that can allow an iPhone to consume cellular data even when it’s connected to Wi-Fi or in apps in which a “Use cellular data” switch is turned off. follow link
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.
Macworld Talks iPhone Cell Data Gobbling and iOS 6 Quirks