Thank you for the question.
We do have a never firmware for FMB640 that will fix this, but unfortunately, we cannot provide any firmware version by the crowd support forum, we recommend you contact with your sales manager.
If you don't have any contacts with our Sale managers, please contact them on our official website:
Please 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 a description of your situation to email@example.com
As for the saved records, Yes, it will send all saved records to the server automatically as soon as the signal is back.