Studies have shown that, compared to using a PSTN line, using VoIP can help you save up to 40% on local calls, and up to 90% on international calls.
Nnyocha egosiwo na, tụnyere iji akara PSTN, na-eji VoIP nwere ike ime ka ị chekwaa ruo 40% na oku mpaghara, ma ruo 90% na oku mba ụwa.