The world's largest retailer wants a chunk of the wireless-carrier game. So on Sunday, Wal-Mart
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This is naturally going to be a shot to the gut of giants AT&T
The players quivering now are the cheaper providers. Wal-Mart's gunning for MetroPCS
Don't start digging any graves, though. Wal-Mart doesn't always get what it wants: Its forays into DVD rentals, social networking, and digital downloads have been embarrassing flops.
Wireless service may be another fiasco, but I wouldn't bet against Wal-Mart. The discounter attracts the perfect audience to pitch low-end yet full-featured prepaid wireless service. Its presence will keep industry prices in check, and that's where shareholders in all of the wireless carriers need to worry.