Zoiper

Why Your Softphone Keeps Dropping Calls and What to Do About It

Every missed call costs you time, money, or a client. You need a reliable VoIP client that connects instantly, works with your existing PBX, and doesn’t drain your battery. Zoiper turns your Android device into a full-featured professional softphone, giving you crystal-clear voice and video calls over SIP, IAX, and other VoIP protocols. Whether you work remotely, manage multiple numbers, or need to stay reachable on the go, this tool removes the friction from business communication.

Core Communication Tools

Zoiper is built around a robust SIP stack that supports both UDP and TCP transport protocols, ensuring stable connections even on unreliable mobile networks. The app handles multiple accounts simultaneously, so you can switch between work, personal, and external lines without closing and reopening the app. It includes built-in support for STUN, TURN, and ICE NAT traversal techniques, which means calls connect even behind restrictive firewalls or corporate VPNs.

For audio, Zoiper employs adaptive jitter buffering and echo cancellation to maintain natural conversation flow. The codec support list is extensive: G.711, G.722, G.726, GSM, iLBC, Speex, and Opus. This lets you choose between low-bandwidth modes for 3G/4G and high-fidelity modes for Wi-Fi. Video calls use H.263, H.264, and VP8 codecs with adjustable resolution and frame rate controls.

Key Advantages for Daily Use

• Multi-line management: Register up to 10 SIP or IAX accounts and switch between them with a single tap from the call interface.
• Advanced DTMF handling: Supports RFC 2833, SIP INFO, and in-band DTMF for IVR menus and conference bridges without errors.
• Call recording: One-tap recording saves audio to internal storage or SD card, with automatic file naming by contact and timestamp.
• Presence and BLF: Monitor extension statuses and busy lamp field indicators directly on your Android screen, just like a desk phone.
• Secure media: Full TLS and SRTP encryption for signaling and media streams, protecting conversations from eavesdropping on public networks.

Download Mobile App Now

You might enjoy having a professional-grade softphone that works with any VoIP provider and keeps your business calls separate from personal apps. Consider downloading Zoiper to replace unreliable consumer VoIP clients with a tool designed for real work.

Internet connection required. In-app purchases available for advanced codec packs and video support.