Цитата(1100.1010.1011.1010 @ Dec 9 2010, 20:05)

SIM900 supports baud rate from 1200 bps to 115200 bps, also support autobauding
mode.
Да, вот только я не понял, почему работает автодетект на 115200 (выше не пробовал):
Цитата("SIM900 Hardware Design 3.7.1 Function of serial port & debug port supporting")
Serial port supports the communication rates as following:
1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200bps.
Autobauding supports baud rates as following:
1200, 2400, 4800, 9600, 19200, 38400 and 57600bps, the default setting is autobauding.