I thought all wallets were mobile. I mean you carry it with you, therefore it to me is mobile. Please explain the meaning.
Its not referring to a physical wallet in this case
Not sure about the 4G , but it being referred to as "mobile wallet"
Some info on "mobile wallet" from reputable sites
bbc.co.uk/news/business-15201807
nytimes.com/2011/09/06/technology/mobile-wallet-gaining-currency.html?pagewanted=all
news.discovery.com/tech/mobile-wallet-set-to-replace-credit-cards-110526.html
pcworld.com/article/228773/google_unveils_mobile_wallet_service.html