Num2sip develops Internet Protocol based (IPbased) mobile internet telephony, delivered by means of 3G, 4G mobile networks and WiFi networks. Num2sip service enables free and lowcost calls for customers by routing calls via WiFi, 3G, 4G and the Internet. The service offers voice over IP, SMS, Video calling capabilities. Num2sip is one of the trading name of Altern telecom. Altern telecom is privately owned, funded by Nour El hadri.