OTO Call

OTO Call is a global voice service trusted by millions. It enables international calls to 90+ countries (including the United States, Canada, and Japan) over your mobile carrier's network for stable, high-quality voice. Ranked First in the International Call division of the 2014 App Award Korea and the Master Consumer Confidence of Korea Brand Awards (2015–2020).

Key benefits include a simple calling experience with no data or Wi‑Fi required, broad coverage without installing extra apps, and calls billed according to your carrier’s policy. If you encounter any inconvenience, please visit www.otofree.com or call +82-2-16000546.