Removing 3G from supported devices

I'm trying to figure out how to remove the iPhone 3G as a supported device for my application in the AppStore. I emailed Apple support asking for them to update it in the reqs section and they responded saying I need to update my UIRequiredDeviceCapabilities keys. Well, it was submitted with :

    <key>UIBackgroundModes</key>
    <array>
            <string>location&l开发者_高级运维t;/string>
    </array>

and

    <key>UIRequiredDeviceCapabilities</key>
    <array>
            <string>telephony</string>
            <string>location-services</string>
            <string>gps</string>
    </array>

in my plist.

Does anyone know what the exact key/value I'd need to set in order for 3G support to not be listed in the AppStore?

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If you want to support the 3GS and the 4, you can put armv7 in UIRequiredDeviceCapabilities.

<key>UIRequiredDeviceCapabilities</key>
<array>
    <string>telephony</string>
    <string>location-services</string>
    <string>gps</string>
    <string>armv7</string>
</array>

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Currently, you cannot explicitly prevent one device type from using your app. You would need to require features that the device doesn't have, but they may not be used by your application, possibly causing background and memory usage issues.