ATM Mobilis is Algeria's leading state-owned mobile operator. While they do not provide a proprietary "2D SIP" app, users can utilize —often referred to as softphones—to make VoIP calls over the Mobilis network. Popular SIP Clients for Mobilis

: A lightweight, open-source SIP softphone for Windows that uses minimal system resources.

: A battery-friendly VoIP softphone that supports voice calls over 3G, 4G/LTE, or 5G networks.