+CMS ERROR: 350 when sending SMS in Quectel EC20

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Testing Quectel EC20 GPRS module. Basic AT commands worked, HTTP worked but when testing SMS, after sending AT+CMGS="MOB NUMBER", returns with +CMS ERROR: 350. What is the cause of this error?

quectel gprs sms
1 Answers

Is it because of network failure. change the SIM or try with new port

user_15555850
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