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I am making an application using c# .
this application send and receive sms by AT Command .
I used AT+CNMI for message delivery but I cant use this in my application .
pleas help me .
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Solution 2

Your question does not share much on what you tried and where are you stuck.

Have a look at this article to start of: Send and Read SMS through a GSM Modem using AT Commands[^]

If you face issues, please share your effort made with specific details where you need help.
   
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Solution 3

my application send and receive sms . bui how I can use AT+CNMI for deliver and recive sms in my application?
   

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