"We will never cheat on our consumers, so that's why per second billing is for every one," the company's chief commercial officer, Eric Van Vulpen said.
"Tigo is focusing on affordability and per second billing makes us unique.
"We were the first to introduce incoming calls free without any regular fee," he said.
Vuipen says average calls are less than one minute and the per-second billing system helps consumers save money.
Tigo says average consumers save 20 to 30 percent of their bill.
Tigo says they expect increased competition across the Asian markets with more players set to enter in 2008.
Tigo operates in 16 countries across the world.