First point it is explained nowhere (even if it makes sense) that must first remove the PIN code by inserting SIM in a phone. Then it must be (as is said in the doc !!) test the functions before using the product in real condition. Once this is done handling the product filled its function Another tip in Tracker mode to increase the frequency of sending the position you have to use the mobile application menu "Issue Command" and then "send command by GPRS" "common" and then "upload frequency" and enter number of second.