The new version of Google Voice for iPhone brings Sprint integration support. Mountain View has updated the application and bumped the version number all the way to 188.8.131.522 in order to bring, among other stuff, the ability to send all calls to the native dialer when the phone is integrated with Sprint.
There’s also multi-recipient texting with contact autocomplete, multi-line text entry field with character count as well as one-touch Copy/Paste in dialpad, but the most important addition is the Sprint integration. iPhone users on Sprint will have all their Google Voice calls being handled by the native dialer for an improved integration and improved experience. Follow the source link below to update your client or consult your phone’s App Store.