Huawei Mate 9 - Manual (Page 8)

4
Dual card dual standby single pass
MHA-L29:Your phone supports dual SIM cards.
Both SIM cards are available at the same time when
you are not using your phone. However, while one
SIM card is active, the other is unavailable. This is
known as dual card dual standby single pass.
For example, while you are using SIM card 1's data
service, SIM card 2's data service will be disabled. And,
while you are on a call using SIM card 1, SIM card 2 will
be unavailable. Someone calling SIM card 2 while you are
on a call using SIM card 1 will either reach your voicemail
or hear a message such as "The person you called cannot
be reached at the moment. Please try later." The
message heard will vary depending on service provider.
Your phone's single pass feature helps reduce power
consumption and increase standby time.
Contact your service provider for information about
subscribing to notification services.
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.