Initially the method of calculation involves assessing the abundance and distribution range of a non-indigenous species (NIS) for a specific area (this can be, for example, an entire regional sea, bay, inlet, lagoon, pond, lake, marina, a sand bank, an aquaculture site etc.).
Press the Menu on your Sprint phone's home screen. Select Settings and press the Menu key. Press the Menu key. Scroll down and highlight the PRL field and press Update. Wait for the update to complete. Press the End key to exit to the phone's home screen.
by Travis Griggs. Sprint 4G Rollout Updates. Wednesday, January 30, 2013 - 10:00 AM MST. A PRL file is a Preferred Roaming List. In simple terms, it tells the device how to scan for various wireless cell systems, which ones are native, and which priority to use them in.