The index score measures the quality of experience for over-the-top (OTT) voice services using a model derived from the International Telecommunication Union (ITU)-based approach for quantifying overall voice call quality and a series of calibrated technical parameters. Examples of these mobile voice apps include WhatsApp, Skype, LINE, WeChat, Viber, and Facebook Messenger.
While the source lists operators in two groups depending on their home market surface area, we have put together the leading operators as one list.
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Leading mobile network operators by voice app experience Asia 2023, by index score
In 2023, Rakuten Mobile in Japan had the best voice app experience in Asia, with **** index points. Another Japanese mobile operator, au, followed Rakuten with **** index points in voice app experience in Asia in the same year.
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OpenSignal. (March 2, 2024). Leading mobile network operators by voice app experience in Asia in 2023, by index score [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/
OpenSignal. "Leading mobile network operators by voice app experience in Asia in 2023, by index score." Chart. March 2, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/
OpenSignal. (2024). Leading mobile network operators by voice app experience in Asia in 2023, by index score. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/
OpenSignal. "Leading Mobile Network Operators by Voice App Experience in Asia in 2023, by Index Score." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 2 Mar 2024, /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/
OpenSignal, Leading mobile network operators by voice app experience in Asia in 2023, by index score ÌÇÐÄÆƽâ°æ, /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/ (last visited July 21, 2026)
Leading mobile network operators by voice app experience in Asia in 2023, by index score [Graph], OpenSignal, March 2, 2024. [Online]. Available: /statistics/1290246/asia-top-mobile-network-operators-by-voice-app-experience/
