Is there a toll-free phone that doesn't use traffic

Voice can tell you that you can make a phone call without traffic: 1. WiFi phone: use WiFi connection to make calls, without data traffic. You need applications that support this phone function, such as WhatsApp, Skype, Viber, etc. 2. Call services provided by telecom operators: Some telecom companies provide call services, such as T-Mobile and Sprint in the United States provide Wi-Fi calls; Jio in India provides VoLTE calls and so on. 3.VoIP phone: VoIP phone uses internet technology, so that users can make calls without relying on traditional telephone lines. This way uses network connection instead of data traffic, so it is also a way of talking without traffic. You need VoIP phone applications, such as Skype, Google Hangouts, Facebook Messenger and so on. These are all ways to talk without data traffic. Different ways have different restrictions and functions, and you can choose the right way according to your personal needs.