I ran out of messages; how can I get more messages?

Go to Menu → Settings → Account, and tap “Buy more text messages.”

Select the pack you need (50 messages –  $2.99; 100 messages –  $5.99 ; 250 messages –  $14.99; 500 messages –  $29.99).

The prices are displayed in your currency in the app.

Unused extra messages are carried over to the following usage cycle, after which they will expire.