Honor 6X 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 simlar to that depending on your service provider.
Similarly when you are using SIM card 1's data service, SIM card 2's data service will be disabled.
Why Single Pass ?
Honor 6X single pass feature helps reduce power consumption and increase the phone's standby time.
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 simlar to that depending on your service provider.
Similarly when you are using SIM card 1's data service, SIM card 2's data service will be disabled.
Why Single Pass ?
Honor 6X single pass feature helps reduce power consumption and increase the phone's standby time.