Look up. Yeah, that’s not an ad on our site… that’s a screenshot of an ad for the Rogers Samsung Galaxy S III, snapped by an Android Central reader doing online research on Samsung’s latest. The important thing to notice is that the ad has the phone sporting an Exynos quad-core processor as well as LTE. This goes against what we’ve been hearing about the North American version of the phone, which is rumored to use a Snapdragon S4 dual-core chip instead due to incompatibilities between the Exynos and LTE.
If this is true, it could be possible to use a Rogers version of the phone on AT&T since they share the same HSPA and LTE bands. Of course, at this point we don’t know anything for sure, including whether only the Canadian S III will go quad-core, or whether all North American versions will get it. Or this could all be wrong and no quad-core/LTE version exists at all. We’ll just have to wait and see.
source: android central