PRLs
http://www.corolada.com/prl/
Its not hard to update manually Download the PRL and save it to your SD card.Then from your phone pad dial (Sprint) ##PRL# then enter your MSL#. You will see Update PRL. Hold on that and it will pop up a Edit window. Once your in there you can browse to your SD card and find your new PRL.Choose it and follow the directions from there.I'm not sure if the ## is the same for Alltel but it should be close.