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Unread 04-15-2007, 12:29 PM   #6
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Cost aside, sending an SMS is way way faster then using GPRS to login and initiate a call back, then logout etc. quite onerous, and beside using SMS can reach a much wider user base, those who has simple GSM phone.

I would have thought something line sending a string with your account number and the serial number of the call back set up, overall just about 8 digits, what could possibly be faster?
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