Great question — answering as the UphillTech team:
Here's How It Works You >>> Forwarding Aggregator >>> SMS Aggregator >>> Mobile Operator >>> Mobile Company >>> Your Customer 3 Major Parties Are Involved in the Whole Process: 1. Mobile Operators: They Manage SMSC (Short Message Service Centers). AT&T, Sprint/NEXTEL, T-Mobile USA, U.S.Cellular and Verizon Wireless are few of the major mobile operators in the whole world. They have deep connections with all major mobile phone companies. Most of them have 800 to 950 telecommunication/mobile companies in their pannel. All of your messages came to them via SMS Aggregators and they forward them to reciever's Mobile Company which send it to receiver in the end. Cost of becoming a Mobile...
Full answer by Junaid K.: https://stackoverflow.stackexchange.com/a/23175753 (CC BY-SA 4.0).
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