1 to ensure that the phone to carry, it is recommended to pay the phone client and mobile phone binding, the use of digital certificates, real name authentication.

That is partly because e-mail via mobile phone is hugely popular in Japan, and e-mail addresses linked to phones are not portable.

For Google Wallet to succeed, carriers will have to distribute Wallet-enabled Android phones, or perhaps Google will "openly" force every Android licensee to carry the Wallet (hardware + software).