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SIM908 problem with Vbat and GND pin

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i was working on a GSM based system with SIM908 and it was working perfectly. After a while i restarted the system and found that GND and Vbat pins are shorted. i really need help on this issue. what to do now?
 

use DMM to check which pin has been short. or check and see which component been blown.

so far i saw my friend doing this project does not faced any issue on GND and Vbat shorted
 

i have unplugged the module and checked . all GND and Vbat pins are shorted internally . i really don`t understand why it`s behaving like this?
 

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