If the MM311 lost connection after firmware update, please check the following troubleshooting suggestion:
- Unplug and re-plug dongle to the PC and connect the MM311 under 2.4 GHz mode again.
- Repair the MM311 by the steps found here.
- Double check if the MM311 had been update to the latest version completely.
These steps may resolve the issue, if don’t, please contact [email protected] for more help.