sim900a giving error 40

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poonam1108@gmail.com

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when i reset the module(SIM900a R11.0) i recieve
+cpin: ready
but when i use AT+CPIN? i get following result
+cpin : PH-NET PIN
Pl. help me to get out of this problem. i am not able to send SMS and call from my module.
Thank u,
Punam
 

I've the same problem, please help.
Thanks
 

have you tried resetting to Factory Default Values?
I think using AT&F (CR) then restart..
 

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