iPhone, XS & XR: dual-SIM, with the eSIM function
The new iPhones have a physical Nano-SIM slot. In order to use the Dual SIM, you can use the eSIM function. In this case, no correct SIM card is necessary more, it is enough for a QR Code or an App from the cellular provider. This must be able to support eSIM. For the establishment of an eSIM, proceed as follows:
- Open the settings on the iPhone.
- Tap on "Mobile network" and then on "mobile tariff add".
- You can now scan a QR Code. Alternatively, you also have the opportunity to "information manually enter", the connection information manually enter.

iPhone DualSIM use
Pixabay
Managing multiple SIM cards
To keep the Overview, you should name your second SIM card according to the purpose. After the setup is done, follow the steps below:
- Select for the new eSIM best "secondary". Thus, you set the current SIM as a primary SIM card and the newly added SIM as a secondary SIM.
- In the next step, you need to select the standard cable for phones. Here it is recommended to use the Primary SIM card as the default line, if you have a flat rate, for example, a telephone.
- You will then be asked whether you want to update the preferred line of contact. Here you can also select the first Option "Primary as the preferred cable to use".
- Tip: you can add multiple eSIM, but only two at the same time. You can also only use the eSIM-cards. Thus, the Insertion of a SIM card in the iPhone.