@mfcss the difference between an MFF2 and an eSIM is:
- MFF2 is a form factor same like 4FF etc. You need a contract with an operator and then order these SIM on a tape and then solder it onto the PCB and later can activate with a tariff from that operator
- an eSIM is an integrated cirquit that you solder onto the PCB and later your customers go to any operator of your choice and ask to get a contract
I don’t have enough knowledge about that but please check the Thales URL: https://www.thalesgroup.com/en/markets/digital-identity-and-security/mobile/connectivity/esim/what-is-an-esim