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Yes, there are many free VoIP (Voice over Internet Protocol) services that provide free network phone calls. Some examples in English are:
1、WhatsApp: A popular messaging app that also offers free voice and video calling.
2、Facebook Messenger: Another popular messaging app that allows free voice and video calls.
3、Google Hangouts: Google’s video calling and messaging app that offers free voice and video calls.
4、Viber: A popular VoIP app that offers free voice calls and messages.
5、Skype: A well-known VoIP service that offers free voice and video calls, as well as text messaging.
6、WeChat: A multi-purpose app that includes free voice and video calling features.
Please note that while these services are generally free to use, they may have in-app purchases or other forms of monetization, such as displaying advertisements. Additionally, the quality of the calls may vary depending on the internet connection and the specific service being used.