Across the world we see successful MVNOs targeting youth, roaming markets, international calling and others.

从全球范围来看，可以看到成功的虚商目标定位于年轻人、漫游市场、国际通话以及其它。

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Powers' latest survey of prepaid services through national carriers and MVNOs.

ENGADGET: Virgin Mobile takes top prepaid honors in J.D. Powers survey

We're just wondering whether GameStop will catch a few customers subscribing as they pick up their Diablo III pre-orders or else face the uncertain future that befalls many MVNOs.

ENGADGET: GameStop Mobile launches as AT&T virtual carrier, gives us rare bring-your-own GSM in US (update)

Perhaps more interesting than the rankings, though, was the finding that customers of MVNOs (like Virgin) ranked their services higher in account management and cost, while direct services (like T-Mobile) fared better in areas like company image and call quality.

ENGADGET: Virgin Mobile takes top prepaid honors in J.D. Powers survey