Google Nexus One User Manual page 155

Google Voice
To open your Inbox
You can return to your Inbox from any Google Voice screen.
Press the Back
S
To check your account balance
When you first create a Google Voice account, you have a balance of US$0.10 for toll
calls. You must log into your account using a browser to add to your balance, but you
can check your current balance on the phone.
S In your Google Voice Inbox, press Menu
A dialog displays your current account balance.
NOUG-2.1-update1-105
button until the Inbox screen appears.
and touch Balance.
Nexus One User's Guide
155