U.S.-based startup VaultTel has launched a tiny cryptocurrency hardware wallet that sits in the SIM tray on mobile phones. The firm announced Tuesday that the wallet solution combines an app and the ...
Piece is about the size of a credit card, albeit it a little thicker, measuring 83 x 55 x 4 mm (3.3 x 2.2 x 0.2 in). Users slot a secondary SIM card (either a Micro SIM or a Nano SIM if used with a ...
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