Merci Thank you very much, the tracking device that I put in my car to secure it from theft, gps Tracker tk 103b coban,. The problem is that some of the commands work such as admin123456, time, stop123456 zone123456, gprs123456, ACC12345, which do not work and the device does not respond to commands such as check123456, resume123456, begin123456, password123456, which are important to me, and the sim card has sufficient balance, and this problem started since 10/15/2024, until now I have not found a solution for the tracking device tracker gps 103b