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The mobile payment race is on, but it's unclear which vendors will succeed

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The gold rush to win the mobile payment race has attracted a lot of different companies, but it's still unclear which ones will succeed at this multi-billion dollar industry. The ecosystem is currently divided into two camps: vendor-driven and user-driven initiatives. The vendor-driven approach includes companies such as Square and PayPal, which offer devices that attach to a vendor's phone to process credit and debit cards. The user-driven services include companies such as Isis and Google Wallet, which incorporate mobile payments as a part of an ecosystem. In this in-depth feature, Fierce Associate Editor Sandhya Raman evaluates both models. Feature