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AT+COPS=? doesnt return or returns CME ERROR 22 To fix roaming situations on a GSM device, I'm trying to retrieve the available networks with AT+COPS=? and compare the SIM's IMSI to the networks' numeric codes Often, instead of a response, there is the echo, followed by device reset after a couple of seconds (roughly 10-20) Occasionally, the invocation returns with CME ERROR: 22, which typically refers to "IMEI not found" or "phone book
Murata LBAD0XX1SC-DM - Monogoto Murata LBAD0XX1SC-DM The Type 1SC module is the world’s smallest Cat M1 NB-IoT module with global certification It supports GPS GNSS, OpenMCU, and Integrated SIMS
AT+COPS=? return CME ERROR: Operation not allowed Im trying to do a network scan by sending AT+COPS=? In rare cases it works as excpected but most time the module returns “CME ERROR: Operation not allowed” after approximately 2 to 3 minutes
AT+COPS=? returns just OK, and the operator list after a while But in my case the command returns immediately with OK, and after a while the modem sends the operator list This looks like other “unsolicited” modem answers I have currently not found any way to get the modem back to the regular sequence It can be forced by sending AT+COPS=1,2,“nnnnn” or AT+COPS=2 while a data session is active
at command - ATcommand at+cops? gives undefined return - Stack Overflow I think you are confused about what AT+COPS? returns The first number does not correspond to which network the phone is attached to, it is the <mode> value The command is defined in 27 007, and its syntax is Table 36: +COPS parameter command syntax Command Possible response(s) +COPS=[<mode>[,<format> +CME ERROR: <err> [,<oper>[,<AcT>]]]] +COPS? +COPS: <mode>[,<format>,<oper>[,<AcT>]] +CME
Criteria AT + COPS =? - LTE Standard Module - Quectel Forums The criteria of the return value of AT+COPS=? should be in the order of: home network, networks referenced in (U)SIM and other networks You can check the EG91 AT command manual to get more information
Network selection (+COPS,+CPOL+CPLS) - Sierra Wireless Forum HI Matt, Thanks for this useful information Does the at+cops=? return the PLMNs in any order (e g signal strength) ? What I am trying to do is to provide the user will a list of available networks (via AT+COPS=?") and then allow the user to choose their preferred network from this list, and then send an AT+COPS command to select the chosen