Android 2.3.7 update brings Google Wallet to the Samsung Nexus S 4G

The Google Wallet service has finally started rolling out to users of the Nexus S 4G on Sprint network ONLY. However, before you start using it, you will need to update your phone to the latest firmware.

Google has dropped the Android 2.3.7 update, which upgrades your phone firmware from GRJ90 to GWK74. You may get the notification asking you to update or you can go to Settings > About phone > System updates to see if you have got any update waiting for you.