Have anyone used shared shortcode to send sms?

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Mobile marketing is the new trend of marketing products because of the uses of mobile phone. According to recent survey about 90% US people read text messages and this shows hoe people want to solve their problems with mobile phone. Sending sms through shared short code to customer helps to reach you products to customer. Short code messaging service is used by all popular realy shows, programs, games and election campaigns to send or populate your message to targeted audiance. does anyone knows good sites in US for this service?