Good day. Thank you for your question.
The Update BLE firmware option on FOTA WEB is used for FMM640/FMC640 as it has a separate BT module and cannot be used for FMB devices because it is using the same module for GNSS, BT, and GSM.
Therefore, we would like to analyze this condition of yours so kindly reach out to us via VIP Helpdesk or contact your Sales Manager/Distributor. If you don't have any contacts with our Sales managers, please contact them on our official website https://teltonika-gps.com/
and click on the "Contact Us" button. When you will click, please fill the form and submit it.
Note: as a topic, please choose "Vehicle telematics" or you can send an e-mail with the description of your situation to firstname.lastname@example.org
Thank you for your understanding.