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How does sending free sms work on such large projects as Facebook, VK, Google?
How does sending free sms work on such large projects as Facebook, VK, Google?
And what you need to do? To implement such a system.
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The easiest option is to conclude an agreement with any SMS provider that has an API. They issue its specification, and forward. For example, one of the SMS providers sends SMS simply by get requests. And in the personal account it is perfectly displayed what was sent to whom and how.
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