eSIM

An eSIM (embedded subscriber identity module) is a form of SIM card that is embedded directly into a device as software installed onto an eUICC chip. It connects to mobile network operators via remote SIM provisioning and users can connect to and change mobile network operators via the settings and without the need to physically add or swap a SIM card from the device. In contrast to physical SIM cards, a single eSIM plan can connect to several mobile network operators. Devices can hold upwards of 20 eSIM plans simultaneously, with 1 or 2 active. To keep them affordable, many eSIM plans only provide data and do not include a phone number.

Most phones and tablets released in 2018 or later support eSIM technology. If a phone is bought directly from a carrier with a SIM lock, the phone can only add eSIMs from the carrier that locked the phone, even after a carrier unlock.

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