Is there way to send SMS from iPhone app without user prompt?

We are going to build iPhone app6 that sends SMS开发者_运维百科 in background.

Can we send SMS without user probpting?

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Short answer NO.

It is due to privacy concern, last time when I search for stuff similar to your task, I was not even able to pre-fill the number to send the text. i.e., like pre-filling to email id when opening native mail app.

But you may explore private API to do this task.