To install a new firmware version on a base station and/or handset, please follow the instructions provided in the firmware update guide.
With some PBXs (3CX, Yeastar, Placetel, FreePBX and FreeSWITCH as far as we are aware) this version is causing problems with handsets randomly not ringing and/or de-registering, please stick to your previous version in case you are using these systems. We are currently investigating this issue.
After upgrading to version 450BXX or higher the rollback to version 410BXX or previous is not possible.
After uprading to version 500BXX or higher you need to update also any M5 Repeater you would like to use at least to 480B5.
A direct update of the base station from V450BXX to V510B2 or higher is not possible, an intermediate update to V500B1 or V501B1 is required first.
please read the release notes carefully before upgrading