Duo Phone Call - Great Calling App, Global Calls with No Roaming Fees, HD Voice Quality over WiFi.

Free Call to anyone, any phone number around the world.

Free Call via WiFi or cellular data, no cell minutes used.

Download this VOIP phone call App & enjoy cheap global calls to any mobile & landline!

Completely FREE CALL

100% Free global phone call. No contract, no hidden fees.

Unlimited Call Credits

Get FREE credits every day, it's so easy. By watching video or playing games, more free lucky credits could be earned. And what's more, as you use it more, more fun tasks could be completed with more free credits. It's totally free as you want. By the way, if you do not want to earn credit, you also can buy credit for calls.

International Calls to over 230 countries

Make cheap international calls to 230 countries. Save up to 90% off cheap international calling rates to India, Indonesia, Brazil, China, Nepal, Thailand and UAE, Kuwait, Philippines and more.

Clear and stable calling

Dial away, enjoy the crystal clear voice sound of high quality phone calls, as clear as a phone call from a landline!

Free Calls across Any Device

Work across mobile, tablet or any smart device. Support many brands, such as Samsung, LG, Huawei, Xiaomi, Nexus, Vivo, Oppo, TCL, Micromax, Realme, Motorola, all supported.

We are excited to hear your feedback on the app!

Contact Us: [email protected]

What's New in the Latest Version 2.3.5

Last updated on Dec 12, 2023

Thanks for your support. This version:- Call Recording Supported.- More Daily Free Coins.- User Experience Optimization.