Connectivity
What is an eSIM?
An eSIM is a SIM card built into the device itself: instead of inserting a chip, the line is activated by downloading a profile from the carrier, usually with a QR code. On a smartwatch it lets you make calls, get messages and use data without your phone nearby.
What changes on a watch
Most smartwatches depend on the phone: they receive notifications and calls over Bluetooth, and if you walk away they lose the connection. A watch with eSIM has its own link to the mobile network and keeps working on its own.
Those models are usually called "cellular" or "LTE" and are sold alongside a Bluetooth only version of the same watch. The mobile connection uses considerably more battery than Bluetooth.
It depends on your carrier
A watch having eSIM is not enough: the carrier must offer eSIM and also support that watch model. Some only activate it on certain brands, and the service for watches is commonly a separate plan that shares your number.
Before choosing the cellular version, confirm with your carrier that you will be able to activate it. If not, you will have a watch that works exactly like the Bluetooth version.
What to check before you buy
- Ask your carrier whether it activates eSIM on watches and on which brands.
- If you always carry your phone, the Bluetooth only version does the same job.
- Expect shorter battery life when the watch uses its own mobile connection.
Guides to help you choose
Frequently asked questions
Yes, if it has a microphone and speaker and is connected to the phone over Bluetooth. The call comes in through the phone and the watch answers it. What it cannot do is work away from the phone.