Siemens MC55 AT manual

Note

•It is not recommended to use the AT+COPS command before passing the CHV (card holder verification) / SIM PIN1 verification. This is because after PIN1 verification the module will automatically try to register to the network as though AT+COPS were 0, regardless of the settings done before with or without SIM, such as AT+COPS=2 which remains unchanged. Also, the test command should only be used after PIN1 authentica- tion.

MC55_ATC_V04.00	Page 165 of 475	3/17/06
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