Dear Momen,
I am a newbee too. I have installed asterisk freepbx to my Raspberry Pi 3 and I am using a Huawei dongle for my mobile phone sim card. I have managed to make things work and using as a voip phone succesfully. But I am trying to do the same thing as you tried to do as well like sending and receiving SMS through Groundwire SIP Chat.
Where should I start? Is there a tutorial? I have read the conversation above but can not figure out where to edit, or write these commands.
Many thank you in advance