Siemens Brodersen MC55 AT - Manual (Page 165)

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