SIM900 and sim holder ESD protection problem

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Sharagim

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Hi,
According to the datasheet of sim900 I use a SMF05C. before putting it in my circuit it was working properly but after installing SMF05C I cant turn on SIM900 and finally I change the module (seems broken). is there any mistake in my design?
 

I think your reset pin is PIN 5 and PIN 2 is VPP you can check the attachment and please follow the all layout consideration
 

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  • SIM900_Reference_Design_Guide.pdf
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thx for your reply.
My sim holder is six pin so I follow the layout for 6 pin without SMF05C it was working properly but after soldering the SMF05C, the SIM900 module became very hot and stop working. I was thinking maybe I soldered the SMF05C in wrong direction.
 

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