RingCentral Phone Firmware

Yealink

AX83H

AX86R

180.87.25.2

Updated Yealink AX devices to firmware version 180.87.25.2:

Configuration updates

• • DSS key display update
• • New alarm call channel parameters

New features and enhancements

• • Real-time call and meetings quality check
• • Wi-Fi network search
• • Quick Wi-Fi self-diagnostics
• • Battery power display updates

System updates

• • New Flash Module support
• • Linux version updated to V6.1
• • TEE hardware encryption
• • Enhanced battery performance
• • Improved Wi-Fi roaming performance

Bug fixes

• • Optimized dialing lag when LDAP is enabled

7/31/2026

9/07/2026

W70P

W76P

W79P

W79P Pro

W70B base station: 146.87.25.2

W56H handset: 61.87.0.9

Updated Yealink W70B base stations and handsets used with W70P, W76P, W79P, and W79P Pro phone systems.

New features and enhancements

• • Added bulk handset speed dial setup through auto provisioning and the W70B web interface.
• • Added support for skipping the default admin password change when accessing new or factory-reset devices.

System updates

• • Added support for a new flash module.

T7X

T8X

Updated Yealink T7 and T8 Series phones to firmware version 185.87.25.4:

Configuration updates

• • Removed bandwidth and RTCP-XR fields from outgoing SIP INVITE messages by default.
• • Hid the Acoustic Shield softkey during calls by default.

System updates

• • Added support for a new flash module.

Bug fixes

• • Fixed an issue that caused the left navigation key to intermittently stop responding.
• • Fixed an issue that prevented Do Not Disturb from syncing from RingCentral to the phone.

6800 Series

6900 Series

6900W Series

Updated Mitel 6800, 6900, and 6900W Series phones to firmware version 6.6:

Bug fixes

• • Fixed an issue that prevented directed call pickup on the 6865i.
• • Fixed an issue that allowed user data to be erased through the phone interface without admin access.
• • Fixed an issue with two-stage BLF call pickup.
• • Added missing Danish translations.
• • Fixed an issue that caused an integrated DECT headset to keep ringing after a missed call.