Generally there is no specific positioning required. Kizy tracker comes with a high sensitiveness to establish mobile connection. Even in areas where calls are no longer possible, Kizy manages to set-up a connection that allows positioning. Thus the tracker also works inside steal containers or buildings. However, please make sure that the tracker is not directly put on a metal sheet (for example the container door) as the tracker needs 2-3 centimeters distance from a big metal item, or isolate the tracker with a piece of cardboard or plastic.
If you want to test it yourself, check the LED on the tracker. The tracking works fine if the LED blinks green in a continous way every 8 seconds. Allow about 20 seconds after starting the tracker to get connected. If the LED blinks yellow, it means no reception could be established.