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 – US $1.99; 100 messages – US $3.99; 250 messages – US $7.99; 500 messages – US $14.99).

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.