Sprint has released firmware updates for the Sanyo RL-4920, LG VI-5225, and Samsung i500.
RL-4920 Version 1.006SP fixes an echo issue
VI-5225 Version LX540V08 improves how the phone handles backlight display when playing Solitaire
i500 Version XG23 fixes compatibility issues with the latest release of Business Connection software.
All three have already been issued to stores for download and are cleared to install in phones.