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Modem Gsm Wavecom Q2303a Módulo Com/rs232/porta Serial Em Comandos Sms Chamada De Voz - Modems - AliExpress
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Amazon.com: OSTENT GSM/GPRS/Edge Quad-Band 850/900/1800/1900MHz 2G Modem with SIMCOM SIM800 Module COM/RS232/Serial Port at Commands Bulk SMS MMS TCP/IP US Plug Power Adapter : Electronics
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