We checked the signal strength and it is good. After getting CONNECT we just get an ERROR without any number.Actually we didn’t write any image on SIM900.So far what we done is
i) Connected SIM900 with PC using RS232 cable
ii) Checked sending an SMS and incoming call.
iii) Tried the MMS code till the error as we mentioned.
We have not connected any microcontroller to connect PC and SIM900.
So,How can sim900 download an image from PC??
Please help us.