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Some modems might see an interim +CREG: or +CGREG: notification when
querying the supported modes.
Aux: > AT+CFUN=1\r
Aux: < \r\nOK\r\n
Aux: > AT+CREG=?\r
Aux: < \r\n+CREG: 2\r\n
Aux: < \r\n+CREG: (0-2)\r\nOK\r\n
Unable to initialize Network Registration
To make this work, skip to the first line with an actual range value.
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