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) --


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plans to take mobile payments from a beguiling theory to a revolutionary practice Thursday, apparently using one phone at


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The Android shop is expected to unveil its long-awaited wireless payment system at an event in New York Thursday, according to several reports.

While Google has

rocketed to the top

of the smartphone software market in a very short time, success in mobile payments is a completely different path.

Google jumps into a field

already crowded

with credit card companies, financial services firms, online payment giants and telcos all eager to control the unfolding wireless wallet.

Google, which has had limited success with its own online payment system -- Google Checkout -- plans to use near field communications or NFC technology in the


Nexus S phone, carried by Sprint, to usher in what it hopes is the mobile phone credit card.

The move threatens to make Google an enemy to its mobile partners like Sprint,


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, which have mobile payment strategies of their own in the works. It's also the telcos that have final say on the features built into the phones they sell.

Google also jumps into a field where


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and presumably


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have mobile payment systems in the works.

Google's mobile pay plan will certainly help pump more interest in outfits like wireless credit-card scanner



and closely held


, a NFC system developer in talks to acquire the U.S. assets of



, a card-swipe hardware maker.

Google would clearly like its mobile payment system to feed a broader location-based strategy that includes local search, coupons and advertising. But like its ill-fated attempt to sell its own mobile phones or rent movies, the push may help stir the pot, but it's far from a guaranteed success.

As one analyst said: "Google throws a lot on the wall, not much of it sticks."

-- Written by Scott Moritz in New York.To contact this writer, click here: Scott Moritz, or email: Scott on Twitter at MoritzDispatch