| CPC H04B 1/3816 (2013.01) [H04B 5/72 (2024.01)] | 17 Claims |

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1. A communication system, comprising:
a processing chip that comprises a first communication interface and a second communication interface; and
two sets of communication circuits, wherein one set of communication circuits is connected to the first communication interface, and the other set of communication circuits is connected to the second communication interface;
wherein each set of the communication circuits comprises a switch circuit, a Subscriber Identity Module (SIM) card port circuit and at least one eSIM circuit, the switch circuit comprises a first terminal and at least two second terminals, the first terminal is connected to the first communication interface or the second communication interface, the at least two second terminals are respectively connected to the SIM card port circuit and the at least one eSIM circuit in one-to-one correspondence, and the first terminal of the switch circuit is switched to be connected with each second terminal.
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