Release notes > VBUC Phone Firmware > Q1 2026
Release Dates: Q1 2026
Please refer to tables below for release notes for firmware updates for specific phone models.
* Dates subject to change.
| Vendor | Model | Firmware version | Release Notes | Start firmware rollout * | Firmware rollout completed * |
| Yealink | T43U T46U T48U |
108.86.25.16 | Updated Yealink T4U devices to firmware version 108.86.25.16, enabling Sync DND and Sync contacts. | Mar 4, 2026 | Mar 27, 2026 |
| Yealink | T33G T34W |
124.86.25.8 | Updated Yealink T4U devices to firmware version 108.86.25.16, enabling Sync DND and Sync contacts. | Mar 4, 2026 | Mar 27, 2026 |
| Yealink | CP965 | 143.87.25.2 | Updated Yealink CP965 to firmware version 143.87.25.2, including bug fixes. | Feb 18, 2026 | Feb 23, 2026 |
| Poly | Trio 8300 | 8.1.7 B | Poly Voice Software 8.1.7 | Feb 24, 2026 | Feb 27, 2026 |