After extensive searching, I purchased a GPS tracker with the designation GF-22, which I intend to place in my car. According to the technical specifications described in the manual, the small device is capable of many things. However, I seem to be having some trouble with it. Following the user manual, I inserted a prepaid card and disabled the PIN code request as instructed, then proceeded to set it up. The downloaded application successfully connected to the device, but during the configuration, for some reason, the device switched to OFF line mode. Since then, the device does not communicate with the application. If communication is required, it displays a message stating that the device is offline and cannot use this service. The status of the LEDs is as follows: red LED is continuously on, green LED is continuously flashing, blue LED is continuously flashing. Please kindly help me so that I can use the device.