Charles Wang is trying to get subscribers addicted to his free text-messaging service, PingCo, so that he can start signing them up for premium services such as backing up address books, selling astrological charts and providing weather updates.

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Its only product was a free voice- and text-messaging service for cellphone users.

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To manage these efforts on social media ( Facebook or Twitter), via text messaging, or email, I recommend Fanminder with its free service.

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