Already-useful smartphones are conquering new territory , most notably the wallet . That 's a long way out , Freed-Finnegan said . The smartphone is becoming a more and more powerful tool for people to manage their finances. The Google Wallet app went public September 19 for Nexus S smartphones . Some say phone-wallet technology is promising but must become easier to use .
Already-useful smartphones are conquering new territory , most notably the wallet . The smartphone is becoming a more and more powerful tool for people to manage their finances. The Google Wallet app went public September 19 for Nexus S smartphones . Some say phone-wallet technology is promising but must become easier to use .