.
How Signal Boosters Work
The external antenna is the most noticeable part of the booster system. Think of it as a tool that reaches out to grab signals that your phoneβs small built-in antenna canβt. For people traveling on rural highways, through mountains, or across open countryside, losing a signal can be very frustrating and, in an emergency, even dangerous. The external antenna finds any faint cellular signals available and sends them to the booster system inside the truck.
