With the help of wifi, you can easily make phone calls with WiFi-only service without a SIM card. And just like a typical phone call, your name will be shown on another device when you call another number. But your phone must be supported wifi calling feature to use it. Oppo A57 also supports this feature. So let’s find out more about it.
Oppo A57 Support wifi Calling
Yes, Oppo A57 has wifi calling feature. You can reach by using this feature without any SIM Card. You do not need to download any third-party application on your mobile to make wifi calls. This functionality is available on your phone settings. You have to enable this setting, and then you will be able to make a wifi phone call.