Switzerland-based firm Sirin Labs has unveiled the world's first blockchain smartphone at around ₹68,000, which features a built-in 'cold-storage' crypto wallet. Called 'Finney', the smartphone features 6 GB RAM, 8 MP selfie camera, and a 6-inch display. The cold-storage wallet is not connected to the internet, making it secure from hackers trying to access cryptocurrencies stored in the wallet.