Sim card communication circuit, related apparatus, and control method

A circuit, comprising:

• a processor;
• a first card slot;
• an embedded subscriber identification module (ESIM) chip comprising an input port connected to a group of subscriber identification module (SIM) interfaces of the processor;
• and
• a first level conversion apparatus, comprising:
• an input port connected to a same group of SIM interfaces of the processor as the ESIM chip input port;
• and
• an output port connected to the first card slot,
• wherein the processor is configured to:
• control the first level conversion apparatus to be enabled and control the ESIM chip to be disabled based on receiving a first message, to implement a connection between the processor and a first physical SIM card in the first card slot;
• and
• control the first level conversion apparatus to be disabled and control the ESIM chip to be enabled based on receiving a second message, to implement a connection between the processor and an ESIM card in the ESIM chip.