BURLINGTON, MASS. - October 9, 2007 -iBasis, Inc. (NASDAQ: IBAS), the global VoIP company, today announced the launch of its TruePrompts™; campaign, a nationwide program that guarantees that customers can receive exactly the minutes announced or "prompted" at the beginning of each call placed using any iBasis TruePrompts calling card.

With TruePrompts, iBasis is reinforcing consumer trust in the company's prepaid calling cards, which are sold through leading distributors in retail outlets nationwide. All iBasis prepaid calling card products throughout the United States now feature TruePrompts, which is easily identified by the bright yellow and green logo on all cards, posters and other point-of-sale materials.

As one of the largest carriers of international phone calls in the world, iBasis is committed to growing its retail calling card business through the continued support of its extensive distributor network. The TruePrompts campaign will help build consumers' confidence in the true value of their cards by delivering the minutes prompted.

"A very large portion of international calls from the United States are placed using prepaid calling services, including iBasis retail calling cards," said Ofer Gneezy, president and CEO of iBasis. "TruePrompts reflects our commitment to providing international calling service that consumers can count on for high quality service and honest value."