According to shutter, MMS works fine on Edge. It makes absolutely no sense to limit even their latest product's capabilities (the 3G) to markets that support the latest network. There is no way MMS depends on there being 3G capability; if this turns out to be true then Apple has made one of the stupidest marketing decisions ever.
So, the two changes to hardware were 3G and GPS; if these two have no effect on MMS availability, then what else could possibly be limiting its usage to the 3G only?
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