You can use one now E.g. With Samsung Galaxy Note 20 Ultra If you are a T-Mobile subscriber. There are careers Issued An update to the model that adds ESIM support to the phone allows you to use your number without slots in a physical SIM. This can be very effective if you have two lines, or if you are traveling and need a physical slot for an international SIM. Although the technology has been around for most of the time, it is still not as commonly used in the United States as physical SIMs, as very few phones support it.
According to XDA developers, The Galaxy Note 20 Ultra is the first Samsung phone in North America to offer ESIM capability for this update. In the US, the only other options that allow you to dig into physical SIMs are the iPhone and Google’s Pixel phone. There are many more models like the Galaxy S21 that can technically use digital SIM but carriers need to enable the feature first before customers can use it.
T-Mobile first On ESIM supports for iPhone in 2018 and has enabled the feature for Pixel devices ever since. If you have not yet activated an ESIM for your number, check out T – Mobile support page You can follow the instructions. Based on a screenshot Posting Reddit, The update adds dual SIM dual standby capabilities to the device. This means you can use two physical SIMs with it, although the other will remain inactive during use.