Yealink firmware can be managed on our platform by utilizing Device and Domain overrides in NDP or advanced configuration overrides in the PBX Portal.ConsiderationsWe do NOT recommend upgrading firmware unless you are addressing a security concern, a bug, or have a specific need for a newer feature.Some firmware upgrades may require a factory reset.While device manufacturers put some protections in place; A firmware upgrade can cause a phone to become unstable, especially if connectivity or power is lost during an upgrade.There may be cases where downgrading firmware can harm or 'brick' a phone.Yealink firmware can be found on Yealink's own website, and it's possible to host their firmware on your own web/file server if you want an alternate firmware.It's possible to use YMCS to manage firmware. More information coming soon.We recommend deploying new firmware to a small subset of devices first before deploying to all devices. Some firmware overrides are added and removed with each firmware revision. You will need to reference the relevant Yealink guide for a full list of overrides. Information about FirmwareThe following table represents which major firmware revisions we have available for each phone model. Please see the bottom of the page for specific firmware versions.SeriesModelv83v84v85v86T2T19 E2✓T21P E2✓T23G✓T27G✓✓✓T29G✓T3T30P✓✓T31P✓✓T33G✓✓T33P✓✓T4T41S✓✓✓T42S✓✓✓T46S✓✓✓T48S✓✓✓T42U✓T43U✓T46U✓T48U✓T41P✓T42G✓T46G✓T48G✓T5T53W✓✓✓T54W✓✓✓T57W✓✓✓T58A/V✓✓✓VP59✓*DECTW53H✓W56H✓✓W59R✓W60B✓✓* Cannot be downgraded after the upgrade.Support for FirmwareSkySwitch will support all of our hosted firmware, and provide best-effort support for other firmware acquired directly from Yealink. We do not support custom firmware for Yealink phones.Upgrading FirmwareThis section details how to upgrade Yealink Firmware with Device overrides and Domain overrides using SkySwitch hosted firmware. A complete list of firmware can be found at the bottom of this article. Upgrading firmware with device overrides using SkySwitch hosted firmwareNote: Please be sure to verify your phone model has a hosted firmware version with the override you are using. If a phone doesn't have firmware in the folder, it will not upgrade.Navigate to Manage NDP and click on the appropriate override column.Note: You can also manage overrides in the PBX Portal > Device Inventory > Hardware > Edit Phone > Advanced (or inside of Button Builder)Apply one of the following sets of overrides using the table found above to reference which firmware is available per phone. Once complete, click the 'Save' button.firmware.url="http://sipcfg.io/frm/yealink/v83"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v84"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v85"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v86"
firmware.url.server_type="http"Upgrading firmware with domain overrides using SkySwitch hosted firmwareNavigate to Manage NDP and then Configuration > Defaults > Domain SpecificApply one of the following sets of overrides using the table found above, to reference which firmware is available per phone. Only one set can be used as a domain override at a time.firmware.url="http://sipcfg.io/frm/yealink/v83"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v84"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v85"
firmware.url.server_type="http"firmware.url="http://sipcfg.io/frm/yealink/v86"
firmware.url.server_type="http"Firmware ListT19P_E2 - 53.84.0.125.romT21P_E2 - 52.84.0.125.romT23 - 44.84.0.140.romT27G - 69.84.0.125.romT27G - 69.85.0.5.romT27G - 69.86.0.15.romT29 - 46.83.0.120.romT31(T30,T30P,T31G,T31P,T33P,T33G) - 124.85.0.40.romT31(T30,T30P,T31G,T31P,T33P,T33G) - 124.86.0.20.rom  T46S(T48S,T42S,T41S) - 66.84.0.125.romT46S(T48S,T42S,T41S) - 66.85.0.5.romT46S(T48S,T42S,T41S) - 66.86.0.15.romT46U(T43U,T46U,T41U,T48U,T42U) - 108.86.0.20.romT41P - 36.83.0.120.romT42G - 29.83.0.120.romT46G - 28.83.0.120.romT48G - 35.83.0.120.rom            T53W(T53) - 95.84.0.125.romT54W(T57W,T53W,T53) - 96.86.0.18.romT58 - 58.84.0.25.romT58 - 58.85.0.5.romT58V(T56A) - 58.86.0.20.romVP59_9.0 - 91.85.0.50.romW53H - 88.83.0.90.romW56H - 61.83.0.90.romW56H - 61.85.0.20.romW59R - 115.85.0.20.romW60B - 77.83.0.85.romW60B - 77.85.0.25.romKnown IssuesNonresponsive USB Port with Sidecar on T5x series phoneThis issue is confirmed to be resolved by updating the phone to firmware T5x-96.86.254.850.rom.Additionally, if you receive an error message that "User" is using the default password, you may change the password via the following override:static.security.user_password=user:xxxx