vikasvns2004
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allright, my problem was because of GND wire and noise on the circuit!
i designed another PCB with wide GND wire, alsi i used polygon under sim908 and around it...
i used LM75CV and a 1n4007 for power...
here's my pcb in altium designer 9.4
**broken link removed**
hope to help u...
P.S, try to use MAX3232 instead of MAX232 if u're using COM port.
Hi
Cann you please send me the schematic and layout considerations because i am facing same problem with my design.