Portable SIM can securely store multiple credentials, such as IDs and passwords, so it also can be used with PCs and other connected devices.

Japanese mobile carrier, Docomo, is showing off their new prototype device, known as the Portable SIM.

The company claims the device utilizes a SIM-based authentication that can wirelessly activate any compatible smartphone or tablet for network access. The NTT Docomo Portable SIM includes three modules – SIM card, Bluetooth and NFC.

The idea behind the NTT Docomo's Portable SIM concept is to allow tablets without SIM cards to make voice calls as well as allowing single-SIM phones to use another SIM for a variety of functions. The Portable SIM works via Bluetooth connection, allowing the user to switch identities, effectively eliminating the need to insert a physical SIM card.

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