It's up to you. The Kyocera Event from Virgin Mobile USA is available with the Beyond Talk plans($35, $45, and $55 per month).
► All of the Beyond Talk plans feature Unlimited Web, Unlimited Data, and Unlimited Domestic Messaging(Text, IM, Email, Picture messages) - with varying number of domestic Talk Minutes - starting at just $35/month.
Beyond Talk Monthly Talk Minutes Messages Web Access
Plans (Text, IM, Email, Picture)
• $55/month UNLIMITED UNLIMITED UNLIMITED
• $45/month 1,200 UNLIMITED UNLIMITED
• $35/month 300 UNLIMITED UNLIMITED
The Beyond Talk plans and phones are described at: http://www.virginmobileusa.com/cell-phone-plans/beyond-talk-plans/overview/#overview
You must pay the full amount of your plan every month for your calling, messaging, and data services to continue. A partial payment will not extend your month. A partial payment will only add that dollar amount to your Virgin Mobile account.