Japanese operator Docomo wants to free your SIM card from your phone to help manage your presence across multiple devices. Today, it announced a prototype Portable SIM device it hopes will one day do that.

The Verge and Tech In Asia both demoed the device which uses a combination of Bluetooth and NFC to connect with smartphones, tablets and PCs to store and transfer IDs, passwords, and other information used for online shopping and more.

Docomo SIM Japans Docomo wants this portable device to free your SIM card from your phone

The mini device loses its authentication when the connection drops, which provides some level of security — however, the thought of putting a substantial amount of personal information in yet another device might deter some from the concept itself.

Docomo is working to commercialize the device to help provide “convenient services and products to customers” across a multitude of platforms, including smart TVs, music players and in-app systems. As ever with Japan, it’s unclear whether the technology will ever be available overseas.

Docomo press release

Image via Tech In Asia