Go to the main menu and select "Settings," followed by "Phone Info" and "Update PRL." It takes less than a minute for your phone to update automatically. First, dial "*228" on your cell phone and press "send." Listen to the menu options and select Option 2.Selecting this will automatically update your phone to include your provider's current network.A low signal on your Verizon Wireless mobile phone can keep you from receiving important business-related calls.
Sprint also allows you to update your PRL manually using the buttons on your cell phone.
Replace the battery and check the phone's signal strength.
Your phone may have registered with the wrong cell phone tower.
These are tests conducted in real conditions, directly in the field. Geolocation precision depends on the reception quality of the GPS signal at the time of the test.
If you'd like to get involved too, all you have to do is download the n Perf app onto your smartphone. After one year, the oldest data is removed from the maps once a month. For coverage data, we only retain tests with a maximum geolocation precision of 50 meters.