Cricket Wireless will add calling options to nine new Latin America countries to their pre-paid wireless plans. For a small fee, customers can add minutes to call these countries.

AT&T's Cricket Wireless is continuing to expand its international offerings for its pre-paid customers, CNet reports. Their most recent addition was a roaming plan that allowed unlimited calling and texts to and from Canada and Mexico.

Cricket wants to stay competitive with their rivals who are also adding more international options. Recently, T-Mobile's MetroPCS added an unlimited roaming plan for customers to call to and from Mexico. That plan is available for free until the end of 2015. In 2016, it will increase to $5 per month.

Earlier this month, Sprint introduced a plan that allows calls to Latin America and more than 180 other countries for a cost starting at five cents per minute, PCMag reported.

For an additional $10 per month, customers can call Colombia, Costa Rica and the Dominican Republic for either 100 or 150 minutes. Unlimited texts and picture messages are also included in this plan.

For an extra $15 per month, customers can add 40 to 70 minutes of calling to El Salvador, Honduras, Guatemala, Jamaica, Haiti and Nicaragua. Customers can add more minutes to this plan if they need to.

These two plans are available on either the $50 Cricket Smart plan or the $60 Cricket Pro plan. The $50 Smart plan offers unlimited calling and texts in North America and 5 GB of data, the $60 Pro plan offers the same features and 10 GB of data.

Cricket updated its international countries list on their website to indicate which countries customers can now call.

This affordable way to keep in touch with family members outside the U.S. gives Cricket a slight advantage over other prepaid carriers that charge additional long distance or roaming fees.