Zoiper-free-3.15-setup.exe |link| Jun 2026

Version 3.15 may experience scaling issues on modern high-resolution (4K) displays or compatibility glitches on Windows 11. Modern Alternatives: Zoiper 5

Remove via Windows “Add or Remove Programs” / “Programs and Features.” Check for leftover config files in user AppData folders if you need a clean reinstall.

Integrates easily with your computer's address book, allowing quick click-to-dial functionality. zoiper-free-3.15-setup.exe

: Make free voice and video calls over the internet.

| Feature | Zoiper Free 3.15 | Zoiper 5 Free (Current) | |---------|----------------|--------------------------| | TLS 1.3 | ❌ | ✅ | | Opus codec | ❌ | ✅ | | Windows 11 support | Partial | ✅ | | Modern UI scaling | ❌ | ✅ | | Ongoing security updates | ❌ | ✅ | Version 3

Select SIP (the most common protocol for internet calling).

Verify your SIP username, password, and domain. Ensure your firewall is not blocking Zoiper. : Make free voice and video calls over the internet

Are you encountering any (like Error 408 or 503)?

The file is the official executable installer for version 3.15 of Zoiper Free, a popular voice-over-IP (VoIP) softphone application for Windows. This specific version belongs to the classic Zoiper 3 product line. It allows users to make phone calls, send text messages, and conduct video chats over the internet using the SIP or IAX2 protocols. What is Zoiper Free 3.15?

While the 3.15 version is an older release, the safest approach for any software download is to always use the official source. For Zoiper 3.15, you can still find the file on some university and tech repository mirrors, but the most secure method is to download the latest free version from the official Zoiper website and, if necessary for legacy system compatibility, locate the specific version archive.