You need a gsm signal jammer. You are being tracked and don’t want to allow it. In this case, you need a portable 40-50M GSM jammer. Keep in mind that even if you have the talent to buy all of these devices, it’s easy to carry them around. That means you also need to look for comfortable and affordable equipment. Today, that’s where combo jammers come in. There are many models, of course, if you are looking for the right model, you can find a device that can meet your needs.