Rumors have suggested Apple is planning to introduce dual-SIM dual standby functionality in some 2018 iPhone models, which would allow two SIM cards to be used at once.

According to a new picture spreading on the internet and reported by a Chinese website recently, which has indicated that the dual-Sim dual standby feature is probably available on an iPhone Home Screen. 

From the screenshot, we could guess the iPhone Dual-Sim feature maybe is different from normal Android devices, users should do a switch setting to another sim card if you want to use it to call.

3u team are not sure about that whether or not the 6.5-inch iPhone could include dual-SIM dual standby in this year.

A separate rumor from the Chinese supply chain has indicated that 2018 iPhones will feature both an embedded Apple SIM and a traditional SIM card tray, so it's possible that dual-SIM dual standby will be available in non-Chinese devices through this implementation method. The Apple SIM is not available in China, so China would require a separate device with two physical SIM slots.