What function does the Preferred Roaming List (PRL) serve?

The function of the Preferred Roaming List (PRL) is to allow phones to connect to the right tower. The PRL is essentially a database that contains information about which cellular towers a mobile device should prioritize and the different networks that are available in various locations. By using the PRL, the device can determine which tower to connect to for optimal signal strength and service quality based on its current location. This is particularly important when users are in areas where multiple carriers overlap and ensures that the phone connects to the most compatible network, enhancing the overall user experience. The PRL plays a vital role in maintaining seamless connectivity, especially when traveling between different service areas.