Huawei Mate 9 Pro - Manual (Page 8)

4
Dual card dual standby single pass
Your phone supports only dual card dual standby single pass, which
means you cannot use both SIM cards for calls or data services
simultaneously.
•
When you are on a call using SIM card 1, SIM card 2 cannot be
used to make or answer calls. If someone calls SIM card 2, the
caller will hear a voice message similar to "The subscriber you
dialed is out of the service area" or "The subscriber you dialed
cannot be connected for the moment, please try again later."
The actual message will vary by service provider.
•
When you are using SIM card 1's data service, SIM card 2's
data service will be disabled.
Your phone's single pass feature helps reduce power consumption
and increase your phone's standby time. It is not related to your
service provider's network conditions.
It may be a good idea to contact your service provider and subscribe
to missed call reminder and related assistance services to avoid the
conflicts mentioned above.
Safety Information
Please read all of the safety information carefully before using your
device to ensure its safe and proper operation and to learn how to
dispose of your device properly.
Viewing the safety and regulatory information
For more information on safety, touch Settings > About phone >
Legal information > Safety information .
For more information on regulation, touch Settings > About
phone > Authentication info .