What is a program with such functionality?

Question

mobile connection

In this article, the operator complains that users were able to talk for 95 hours using the software in 24 hours.
What kind of software is this and how is this even possible?
www.nur.kz/856349-marat-dzhilkibaev-bolee-polumill...

Answer 1

almost any operator has the opportunity to issue additional SIM cards with the SIM-pair service, and by inserting them into different phones, you can call from the same number using the same tariff. They can call you only on the main phone (one of the sim cards in the simpar is considered active, the rest are passive). That is, no one programmatically prohibits calls from the same number in the cellular network at the same time.
Well, here, apparently, just software in the phone or other device where you can connect a SIM card allows you to make several calls at the same time. There is no special sense in this - if the tariff is not unlimited, all calls will be taken into account. If unlimited - then yes, the load on the network increases.