Thank you Nik for the reply.
Believe me, i have read literally the entire internet resource on this topic.
But the problem that i am facing is really driving me crazy.
I see no issues to communicate from GSM modem to Hyper Terminal, or Hyper Terminal To MCU.
My code should be working.
But MCU to GSM Modem, i am not able to receive the “OK” from it.
Need help.