Problem With gsm modem | Electronics › Electronics › Problem with GSM SIM900 module › Problem With gsm modem January 26, 2016 at 11:04 am #13659 Krushnakant SalunkheParticipant vishal , i m facing same problem what should i do? What is power requirement for sim 900a ? I m giving power to modem by 5v adapter 1A current. Is it sufficient?? Plz reply fast
