HL8548 respond when change country

Hi, i’m using HL 8548 to use sms and call function.
When i move from our country to another contry, how can i detect if i change country. What command HL8548 will be responded?
Thanks in advance.

is it changed to roaming? if yes, you can check by AT+CREG?

Thanks your respond.
May i check manually AT+CREG? command or HL8548 auto send me CREG command (like +SIM: 0) to notify me country has changed.

You can check manually at+creg? Or you can set at+creg=1 to have unsolicited message when network status is changed.

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Thankyou for your support. It’s clear for me.