We often observe that cell phone have sim card that have cellular networks carriers. We often spend lot of money on calls as well as long distant calls. But there is solution to it instead of making economically taxing long distance calls we can just make VOIP call for long distance solution were two users at their respective location connects through their Wi-Fi, and their analogue voice is converted into digital data and is sent via internet
The modification method you’re thinking that concerns long-distance phone calls. VoIP, or phonation web Protocol, may be a methodology for taking Analogue audio signals, just like the kind you hear once you speak on the phone, and turning them into digital information which will be transmitted over the net.