SynapS3 Mobile Unified Communications Client for iPhone. Available Business Feature Set and Fully Integrated with the Arrow S3 SynapS3 ucCloud solution for SIP dialing, multiple call handling, fixed mobile convergence, access to voicemail/message waiting indication (MWI), transfer, hold/resume, mute/unmute, conferencing, instant messaging, presence, click to call, click to email, click to chat, address books, call history and call recording. Download this app and contact Arrow S3 for login credentials.