The quickest check: dial *#06# in your phone app. If a 32-digit EID number appears, your phone supports eSIM.
You can also check in settings:
- iPhone: Settings → Cellular → look for "Add eSIM"
- Android: Settings → Network & internet → SIMs → look for "Add eSIM / Download a SIM"
Also make sure your phone is unlocked. For details, see our device compatibility guide.