OnePlus was one of the last major Android brands to adopt eSIM, so the dividing line is recent and sharp. If your OnePlus is a 10 or older, it does not have eSIM, no matter how capable the phone is otherwise.
Check this phone in one tap
Let the page work out which handset you are on, or type the model. It answers straight away, and it tells you how sure it is.
OnePlus models that support eSIM
OnePlus 11, OnePlus 12, OnePlus 13 and OnePlus Open.
OnePlus models that do not
OnePlus 10 and 10 Pro, OnePlus 9 series, 8 series, 7 series, and the whole Nord line.
The regional catch
OnePlus enables eSIM on some regional versions of a model and not others. The Indian variants in particular have historically shipped without it, and the Chinese versions are built differently from the global ones. Because OnePlus phones are bought grey-market more often than most, a lot of people end up with a handset whose specification does not match the one they read about.
For a OnePlus, treat the model list as a starting point and the check below as the answer.
How to check your OnePlus
Open Settings → Wi-Fi & network → SIM & network. An option to add or download an eSIM means it is supported. On OxygenOS 13 and later the path can be Settings → Mobile network instead.
The check that always works
Open your phone's dialler and type *#06#. You do not need to press call. A panel appears with your device identifiers. If one of them is labelled EID, a 32-digit number, your phone has eSIM hardware. No EID means no eSIM.
This works on any phone, any brand, any region, and it is the only check that cannot be thrown off by a model name that was sold in several different versions.
What if your phone does not support eSIM?
Then a travel eSIM is not an option for that handset, and no app or update will change it: the eSIM chip is physical hardware. Your realistic choices are a local physical SIM bought on arrival, your own operator's roaming package, or using an older eSIM-capable phone as a second device. If you are close to replacing the phone anyway, every current flagship and most current mid-range models have eSIM built in.