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NTT DoCoMo Develops External SIM Card for Wearable Devices

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Japan's NTT DoCoMo says that it has developed the world's first remote wireless SIM card that can transmit its authentication details to secondary devices without being plugged into them.

Portable SIM incorporates three major modules: SIM card, Bluetooth and NFC. The pocketsize mini device is expected to be incorporated in to wearable devices after further work on shrinking the size of the card.

By simply waving Portable SIM next to a mobile device, the user's subscriber identity can be transmitted to the mobile device via Bluetooth, eliminating the need to physically insert a SIM card. Using this feature, for example, the smartphone user can switch their subscriber identity from a personal device to a shared tablet in the workplace. For security, the switched phone number in the smartphone is locked once the Bluetooth link is broken.

Portable SIM can securely store multiple credentials, such as IDs and passwords, so it also can be used with PCs and other connected devices to eliminate the need to type in such information when accessing online-shopping and other sites.

Going forward, DoCoMo said that it will continue to study key technologies, functions and service applications before commercialization of the device.

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Tags: ntt docomo  sim card  Japan