Processing method, terminal equipment and readable storage medium

A processing method, a terminal device and a readable storage medium, the method comprising: receiving a switching instruction of an identity identification card, and obtaining a first identity identification card (S10); and keeping the registration state of the currently used second identification card in the packet switching domain, and registering the first identification card in the packet switching domain (S20). According to the processing method, when the switching instruction of the identity identification cards is received, the registration state of the currently used second identity identification card is kept, so that the second identity identification card continuously supports the data service, and meanwhile, the first identity identification card is registered in the packet switching domain, and at the moment, even if the registration of the first identity identification card to the packet switching domain fails, the first identity identification card is not successfully registered in the packet