Voice over IP (VoIP) delivers phone call messages through the IFTTT app to your device. It’s available internationally and is an excellent alternative to the Phone Call service. All you need is the latest version of the IFTTT app.
Recently, the Chinese Ministry of Industry and Information Technology (MIIT) requested that CallKit functionality, which powers VoIP Calls, be deactivated in all apps available on the China App Store. If you downloaded the IFTTT app from the China App Store, then unfortunately VoIP Calls will not work for you.