Yes, you can have more than one eSIM installed in your phone, but you can only use one eSIM at a time, and can switch from one eSIM MSISDN phone number to another eSIM MSISDN phone number installed in your phone. The physical Dual IMSI SIM comes standard with two phone numbers (UK & US) which you can as well switch from one to the other when using to place calls. You have to designate one eSIM for Data usage and the other eSIM for Voice. You cannot use all the two eSIMs at the same time to receive calls or access DATA. Each eSIM must be assigned to a DATA access or a Voice Access in your Smartphone or Device. However, you can switch the assignment between the eSIMs in your Smartphone or Devices at any time.