Hello, I am from Cuba, I also have a bds gps tracker c13 of the Carrfan brand - cj720 Global, which responds to the capture commands shared by the administrator. I have not been able to use it because I cannot connect it to the internet, I think because it does not keep the apn, I configure it and after a while it returns to the one it brought from the factory by itself and I have not been able to find the command to send myself the location by sms either. My cell phone number is 53282604. I’ll leave it for someone from Cuba who knows and can help me write me on whatsapp, thank you very much.