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Now let's look at some of the settings found under Settings>General. The first item here is About. The About tab will tell you if you have enough storage space, how many applications you already have, and you can see which version of the iPhone OS you're running, which you may need to know in order to check if it's compatible with the app you want to download. Now let's say you're downloading an application that's 30 megabytes in size, you'll need a Wi-Fi connection to do that. If you're at a friend's house and he's got a Mac address filter on his router, he'll need your Wi-Fi address to add your iPhone to his filter list.
The Wi-Fi address is the unique number of your iPhone or iPod touch's Wi-Fi device and this information is also found here in the About section. Other useful information found in the About section includes your iPhone's Serial Number and model Number, should you need to file a warranty or a repair claim or if you're just keeping records of all your gadgets. On many mobile phones, a lot of information is usually placed on stickers or engraved beneath the battery. Of course, since the iPhone doesn't have a removable battery or any opening compartments, a lot of the information you'd find under the battery is located here in the About area. That information includes the IMEI number, which is your iPhone's unique identification code used to identify your phone to a GSM mobile station.
If your phone is stolen or lost, you could use the IMEI number to stop the phone from being used to place calls. This number is not related to the phone's sim card and cannot be changed by swapping out sim cards. This is also where you'll find the ICCID number, which is a 20-digit serial number for your phone's sim card and you'll also find your iPhone's modem Firmware number here, which usually shouldn't concern you unless you're doing some iPhone hacking. New to iOS 6, this is where you'll find the ability to limit ad tracking by tapping Advertising. Here you'll find the Limit Ad Tracking switch.
Many apps these days, especially free ones, feature in-app advertisements. Previously, and currently as well, ad networks were able to target users with specific ads by tracking certain activities through the apps they used. When Limit Ad Tracking is activated though, advertisers will only be able to access a very limited set of data related to issues like security, bug tracking, and other generic information. Even with Limit Ad Tracking off, none of the data collected is tied to you personally, but with it on, you'll eventually start seeing fewer targeted ads. I say eventually because Limit Ad Tracking is still relatively new, but all apps running on iOS 6 are essentially forced to comply with it.
So if you want to keep the ways you use your apps even more private, you can turn this feature on, but other than that, chances are you'll rarely need to look in the About section here unless you're having trouble with your phone and you're on a tech support call with an operator who needs to know stuff like your IMEI number or the like. But now you know where to find this info, if you ever need it.
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