eSIM technology is quite new and not all devices are compatible.
To check if you can use eSIMs in your phone, please have a look at our updated list of compatible devices.
You should check that your phone is unlocked.
We suggest you ask your operator if there are any eSIM restrictions on your phone.
For example, we know that Samsung S20 and S21 FE phones are not eSIM enabled. And if your iPhone is from China, you should check with the manufacturer if it is compatible.
In any case, it’s always best to check before buying an eSIM.