How does Apple set up a dual card dual standby mobile phone?

2. After entering "Settings", click "Cellular Network" again.

3. At this time, we can switch the primary number/secondary number to connect to the network in "Cellular Data" and switch the primary number/secondary number to make a call in "Default Voice Number".

4. In "Mobile Number", we can set to enable or disable the primary number/secondary number, etc.

5. You can set the default SIM card 1 or card 2 to call all contacts, so you don't have to choose every time you call, just dial out. Generally speaking, dual-card dual-standby mobile phones can be easily used by setting up data streams and making calls.

Apple's mobile phone began to support dual card dual standby from 20 18, and iPhone XS Max was the first model to support dual card dual standby function.

Dual-card function is used by two nano-SIM cards. Dual-card function is supported by two nano-SIM cards in China, namely iPhone 1 1 Pro, iPhone1/pro max, iPhone XS Max and iPhone XR. You can use two phone numbers to make and receive calls and send and receive short messages.