GSM GPRS Module SIM800C USB Wireless Communication Modem with Bluetooth Phone Voice SMS Data





Description
Reviews 1
I received the module in what appeared to be good condition, but it does not detect any SIM card. I’ve tested it with multiple working SIMs (full-size, no PIN, valid carriers), and followed all standard AT command tests. The modem responds to AT, but always returns +CSMINS: 0,0 and AT+CPIN? → ERROR, which means it cannot detect the SIM at all. I also checked voltage and power supply — everything is within spec (stable 4V, 2A+). Either the SIM slot or the internal circuitry is defective. Please avoid this product or make sure you're getting one that’s factory-tested before shipping.
I received the module in what appeared to be good condition, but it does not detect any SIM card. I’ve tested it with multiple working SIMs (full-size, no PIN, valid carriers), and followed all standard AT command tests. The modem responds to AT, but always returns +CSMINS: 0,0 and AT+CPIN? → ERROR, which means it cannot detect the SIM at all. I also checked voltage and power supply — everything is within spec (stable 4V, 2A+). Either the SIM slot or the internal circuitry is defective. Please avoid this product or make sure you're getting one that’s factory-tested before shipping.
GSM GPRS Module SIM800C USB Wireless Communication Modem with Bluetooth Phone Voice SMS Data — buy online with free worldwide shipping!
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