If you have a cellular signal but no Wi-Fi, these popular apps use your mobile data plan (3G/4G/5G) or carrier minutes instead.
: Specifically designed for offline calling to any mobile or landline globally without the recipient needing a smartphone or internet. Cellular-Based VoIP Apps Calling Apps For Android Without Wifi
: A true peer-to-peer (P2P) app for voice and video calls that requires no internet access or registration. It works over local networks, such as a home or community network. Calling via Local Access Lines If you have a cellular signal but no
