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sim 900 error (PS Busy)

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hasmibaih

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Hi everyone,
i got problem with my sim 900,
my cable to antenna was broke, my cable was ufl to sma connector with female pin
i had tried in my country but i didn't find
then i tried to make it
and then when i try to using it for sms gateway in my sim 900, the respon was error, PS busy
when i check with AT+CSQ, the signal value was 1- 10
i check my cable, i think its ok
why my sim 900 respon was error, PS busy?
help me please
 

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