You can't do it with a standard ApplicationBar
. As I said the default dehaviour is to hide the text.
Also WP7 user has a special user-expirience, so if he can't understand the meaning of your icon, he will press "..." to read the text.
But you can emulate an appbar in some scenarious:
<Border Background="{some gray color from phone resources}">
<StackPannel Orientation="Horisontal">
<Button Content={Binding TextB} Command="{Binging CommandA}"
Style="{your appbar-like template}"/>
<Button Content={Binding TextB} Command="{Binging CommandB}"
Style="{your appbar-like template}"/>
</StackPannel>
</Border>
Put it on the bottom of your page. But be ready to spend lot of time to emulate standard appbar behaviour. I don't think it is a good idea.