jiPBX - SIP VOIP Softphone is a free SIP client that efficiently works to streamline digital telephony for Android that uses Wi-Fi or 4G/LTE connection. It offers the best way to make calls, and the VoIP system ranges from small businesses to large-scale enterprise solutions. Connect your phone system with business platforms, apps, and more on a single and centralized platform and get more value for the business. jiPBX offers a single platform that connects everyone in your organization! -FREE