Hi,
Any proceedings on this issue?
We also have an FMM640 that works perfectly on 2G. However, no success with using it on 4G. I've tried all possible combinations in Network Settings. If I use "Auto", the device falls back to 2G. If I force 4G (with any network modes or band selection), the device simply cannot go online.
The SIM card is OK, it uses 4G if we put it in a phone.
Firmware 00.03.74.T112.
When I try to make Dump in Teltonika.Configurator (1.7.4 B.FM64 R.12) it gives the following error message:
"Response Id from device does not match with expected response Id. Receive response - FileManagementRequestResponse, expected response(s) - Ack"