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I want to make an app "Call a stranger". How? It would make calls to a random app user over the mobile data connection. How do I do this? How do I make an app that uses mobile data? And, where do I buy a server for this app?

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closed as too broad by gnat, Oded Jun 24 at 9:17

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

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recommended reading: Where to start –  gnat Jun 24 at 8:06
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