+CMS ERROR 500 basically refers to unknown error and it is hard to determine, but mostly this may refer to one of the following situations based on Modem or. The number of send errors should be low in comparison with the number of sent messages. If it is too high then it indicates that there are. Hi Ansar, The error text "+CMS ERROR: 500" is what the modem is reporting when NowSMS tries to send a message. The bad news is that this can be very.
Topic simply: Sms error code 500
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