Open your settings and look for "Add eSIM". iPhone: Settings → Mobile Service → Add eSIM. Android: Settings → Network & internet → SIMs → Add eSIM. If the option is there, your phone takes an eSIM.
Second check — is it unlocked? iPhone: Settings → General → About → Carrier Lock should say "No SIM restrictions". Android: ask your carrier or the shop that sold the phone. A locked phone refuses a travel eSIM even when everything else is right.
iPhone: XR, XS and every newer model, including the eSIM-capable iPhone SE models. iPhone X, 8 and older have no eSIM.
Android: Most recent Google Pixel and Samsung Galaxy flagships and a growing number of others — but the same model can differ by the country it was sold in. Check the settings, not the model name.
No eSIM on your phone? Install the plan on another eSIM phone and share its data with personal hotspot — every plan allows it.
I bought a plan and my phone can't take it. If the eSIM is not installed, we refund in full on request.