The choice of the mobile operator depends on the type of micro spy you have. If you have a GSM microspion, you must choose a mobile operator that offers coverage in the area where you want to use the microspion. Some GSM micro-espions can work with several operators, while others are locked to a specific operator. It is important to read the product specifications to know which operator is compatible with the micro-espion before buying it. If you have a wireless micro spy, you may not need to choose a specific mobile operator. In any case, it is important to comply with local privacy and surveillance laws when using a micro-espion.