Huawei Honor 3C H30-U10 Quick Start - Manual (Page 2)

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."
•
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 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.