The eSIM habit doesn't stop at phones, and if you travel with a tablet for work or a cellular smartwatch for running routes, the same technology applies - with a couple of honest catches worth knowing before you buy twice.
Not just phones anymore
Tablets and smartwatches with cellular models use the same eUICC hardware and the same GSMA profile system as phones. If a device is sold in a "wifi + cellular" version, that cellular version almost certainly supports eSIM the same way your phone does - same install flow, same ninety-second-class handshake, same unlocked-device requirement.
Tablets: convenient, but a separate purchase
Here's the catch: a data plan installs per device, not per person or per trip. A plan on your phone doesn't extend to your tablet just because they're both yours and both in the same bag. If you want your tablet online independently - useful for video calls or offline map downloads that outlast your phone's battery - it needs its own eSIM, bought and installed separately, even for the same destination and dates.
This trips up families and pairs more than solo travellers. Two phones plus a shared tablet on the same trip means three separate eSIMs if all three need to be online at once, not one plan stretched across devices. It's a real cost to budget for, and it's better to know it going in than to discover it standing in an airport lounge trying to get a tablet online on the flight.