Yealink firmware release
Yealink SIP-T41S Firmware 66.86.0.15 & Release Notes
This ROM file (22 MB) is ready to download. Load it through the phone's web interface (Settings → Upgrade) or push it with your provisioning server.
DownloadAbout this firmware release
About the SIP-T41S Firmware 66.86.0.15 & Release Notes
Firmware version 66.86.0.15 and release notes for the Yealink SIP-T41S, released December 30, 2025. This copy, last updated by Yealink on December 30, 2025, and you can read it right here or download it.
Before upgrading, check the phone's current firmware under its status menu, read the release notes for known issues, and update a single phone first. On a hosted phone system, firmware is usually pushed through provisioning so every phone updates the same way.
The SIP-T41S has been discontinued by Yealink, but it's still widely used, and this document is still the reference for setting it up. The Tech Team™ supports end-of-life Yealink phones and can help you plan a replacement when you're ready.
SIP-T41S is end of sale. Support options, dates and replacementsWhat’s inside
- New features in this release
- Fixed and known issues
- Upgrade notes and compatibility
Phones covered
Yealink phones this firmware release covers
Related
More Yealink firmware & release notes
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FAQ
Questions about this document
Quick answers, and The Tech Team™ is a call away if you need more.
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Yealink and Yealink product names are trademarks of Yealink Network Technology Co., Ltd. Product information, images and documents are published by Yealink and provided here for reference by smplVoice. Firmware and documents are Yealink’s original, unmodified files.