sheimy 
the serial output from GSM board is RS232 when i connect it with PC i can send the AT commands to it and the GSM understand the commands and replay the OS is Android 2.3 now the MINI210S console use com0 , when i connect the gsm TO that port and connect to it using Itest serial program sometimes i can send command i sometimes i cant now i change the console to be com1 i can send command and the gsm replay to it but it cant understand them as an example if i send AT it will replay with AT but it dos not replay with OK like when i connect it with my PC how i can solve this problem the PC understand the mini210s and also understand the gsm but the gsm dos not understand the minin210s