I am developing a system that allows mobile subscribers to borrow limited amount of airtime. The only problem is I don't know what SMS gateway to use. Your assistance would be highly appreciated. Thanks!
closed as off topic by danlefree♦ Jul 1 '12 at 16:55
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If I understand your question correctly you may want to check out the following SMS gateway services. They both provide an easy to use API and won't cost you a fortune.