Flip your bWalletX card and sign the back with your finger. It stays on your phone. Next: sign contracts with it and seal them on Bitcoin for under a penny.
bWalletX Sign with your finger. Seal on Bitcoin. Flip your bWalletX card and sign the back with your finger. Your signature stays on your device. Next: sign bit-sign contracts with it and seal them on Bitcoin for under a penny. 






