An internal antenna booster is device designed to increase the reception of a mobile phone connection. Manufacturers of these devices claim they increase calling area, provide better signal retention, and reduce or eliminate annoying phone static. These boosters are reputed to increase reception in tunnels, buildings, basements, and remote locations. Manufacturers claim internal antenna boosters can help to free cell phone users from the frustration of dropped calls as well.

Internal antenna boosters are designed with magnetic properties. These properties are supposed to work by capturing electro-magnetic waves and redirecting them to a cell phone's antenna. This technology is said to provide better reception both indoors and out. Such antenna boosters are designed to work on analog, digital, and even tri-band phones.

Installation of an internal antenna booster is supposed to be fairly easy. Users can often choose between installing antennas inside their cell phones and keeping them external. Antenna boosters are usually designed to attach like stickers, making installation easy. When installed internally, an antenna booster is made to be placed under a cell phone battery. Internal antenna boosters are available from a range of manufacturers at various prices. In most cases, these devices are considered to be low in cost.

Some companies are now marketing antenna boosters along with radiation shields. These shields have adhesive backing like the boosters and can be installed with similar ease and speed to cell phones. Like antenna boosters, radiation shields can work with all cell phone models.