Research SIM 900A - Module Setup and Initialization; SIM Card Insertion and Power Connection

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GSM GPRS SIM900A MODEM
REV1.0
MODULE SETUP
step 1 : Insert SIMcard into the SIM slot.
step 2 : Plug in 12V -2A DC power adapter, power led is lit (place jumper between PWRkey
and on pin for only to turn ON automatically).