Updating the preferred roaming list (PRL) on your Sprint phone can help improve signal strength on and off the Sprint network, reduce drop calls, and assist with Web connection issues. It also can help if your phone is unable to make calls when you are roaming off the network. Updates can be performed directly from your phone's handset. The steps might vary slightly depending on your phone's model.
Press the "Menu" on your Sprint phone's home screen. Select "Settings" and press the "Menu" key. Select "Phone Info" and scroll down to "Version." 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.
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Touch "Settings" and select "General." Touch "Update PRL" and wait for the update to complete. If there is no update available, press the "Menu/OK" key. Touch the "End" phone key to exit to the phone's home screen.
Tap the green "Phone" key from the phone's home screen. Tap "Preferences" from the "Applications" menu. Tap "Update PRL" and wait for the update to complete. Tap the red "End" key to exit to the phone's home screen.