Dual-SIM (without the suffix hybrid) means that two SIM cards (usually nano-SIMs) can be physically inserted in the device. The hybrid SIM is permanently installed in the device; in order to be able to use it, the provider must support hybrid SIMs; the access data for the hybrid SIM is obtained with a code via the Internet (WLAN access or an active normal SIM already in use is therefore mandatory for installation) and can then be transferred to the hybrid SIM installed in the mobile phone. Caution: Most manufacturers offer only one physical SIM compartment via "dual SIM", the second SIM is then hybrid, i.e. permanently installed. The second compartment, which is often available, only allows a memory card to be installed. So take a good look.