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SIM 908 Normal Power Down

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engr.waqas

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I'm using SIM908 module. My issue is module is responding to AT commands but cant find the network.
When I power up the module it sends "Normal Power Down" to serial terminal still its power LED is on and responding to AT commands.

I tried AT+CFUN? command, sometimes I get 4 as response and sometimes I receive "Error"

Plz note that I'm not getting any voltage on SIM VDD.
 

Did you change your power source for a more stable one ?
Did you solve this problem. Tell us how please, so we also can learn...
Thanks
Rod
 

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