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set your digital multimeter on diode check mode & connect Red probe to sim holders GND(pin5)
touch black probe to other pins of simcard holder one by one it will have to show
reading 700 to 900 on meter
if reading is 0 or reading >1000 there is mistake in sim holders connection
also check...
set your digital multimeter on diode check mode & connect Red probe to sim holders GND(pin5)
touch black probe to holders other pins one by one it will have to show
reading 700 to 900 on meter if not there is mistake in connection
also check shorting simcard holders pins on module side...
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