The new international feature will automatically tack on to select plans starting in August.
The offer is targeted at rival AT&T, which just closed its acquisition of DirecTV and began offering its own bundles of discounted wireless and satellite TV services.
Helio, which flamed out five years ago, is taking on the US wireless market with a new parent company and simple $29-a-month plan.
The wireless carrier's Open World plan will also charge five cents per minute for calls to Latin America, the Dominican Republic and over 180 countries around the world.
The company, which already offers free mobile phone service via Wi-Fi networks, is trying to make a name for itself with the introduction of a $99 Android handset.
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The free-call bonanza now includes France, Israel, Italy, Thailand and the UK, among others.
The new add-on options provide customers with options to call more countries in South and Central America.
The struggling carrier's Direct 2 You program, which brings a customer rep to a place of your choosing, now serves New York, Los Angeles, San Francisco and Denver.