FMB640 TM2500 AT Command to enable STK

Hi, I am working with a Multi-IMSI SIMCard and I need to enable the STK (SIM Took Kit) in the FMB640 (Internal modem TM2500). Is there any AT Command list for this modem? Is there some way to enable the STK?
I already tested FMM125 and it worked fine.

Best regards

Hi Rsilveira,

We would like to analyze your issue.

Please contact your sales manager. If you don’t have any contacts with our sales managers, please contact them on our official website and click the “Contact Us” button. When you will click, please fill out 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 When contacting Us, please provide: IMEI/Logs/Configuration file/Intenational GSM number/Firmware version/ect, please follow these recommendations: Recommendations for filling a query description - Wiki Knowledge Base | Teltonika GPS

Note: If you have access to Helpdesk you can also create a ticket and the IoT Engineers will assist you.

Thank you.

Best Regards,
Maynard C.