This is the most dangerous type of Bluetooth attack. Even if the Bluetooth on your smartphone is in invisible mode, it can still be attacked with the bluesnarfing method. However, being set on invisible mode makes it more difficult for them to figure out the model and name of your device. Attackers use this method when they want to access data on your phone. Such data can include addresses, calendar information, bank details, and IMEI (International Mobile Equipment Identity), which can be used to route your incoming calls to their cellphones. To protect your device from bluesnarfing, regularly update your device software and make sure that your Bluetooth is in invisible mode when in use. Also, switch it off when you’re not using it.