This section is intended to provide you a quick guide on how to identify and solve the main problems when using CellLocate service
In the u-blox cellular modules supporting CellLocate there are some fallback logics implemented to provide as much as possible a useful response even in edge conditions.
moreover If it is not possible to identify a previous position and it's not possible to identify the country because of lack of connectivity, then the latitude and longitude information will be set to '0' or to another default value depending on the FW version, while uncertainty information is set to 20000000. These are typical response for this use case, that can change according to the FW version:
Note that the sensor_used parameter is set to 0 (highlighted in bold), indicating that the response is estimated by the cellular module and not by the CellLocate service
Note: the information of the last position is lost after the module reboot
In case of connection issues, it's suggested to look at the Module connection setup guide