###Human: Is it possible to insert GPRS chip inside ear? ###Assistant: Hello. Yes, it is technically possible to implant a small GPRS (general packet radio service) chip in your post aural region. But, that type of device cost a lot. I do not think that anyone can access to that type of device as shown in most of spy movies. So, do not worry. Nobody is going to track you. If still you have any doubt then you can do an x-ray of mastoid region to clarify it.