Hi,
What is the difference between old and new basebands?
what is the benefit of the new over the old?
where can i find the new baseband, and how do i know if a rom is compatible with the new baseband?
thanks
New baseband has better GSM Signal and 3G stability. Stock Gingerbread based ROM's like AGA and OpenOptimus are usually the ones with new baseband support.
A port for CyanogenMod 7.2 is now available with full support for the new baseband as well.
Nitrogen however has almost full support because data is not working just yet.
All other ROM's not mentioned here are for old baseband.
If you are coming from stock LG 2.3.3 then you already have new baseband installed, so there is no need to flash it.
Otherwise to flash new baseband (or old baseband) you can follow the tutorial below.
You can easily switch from old to new and vice-versa as long as you do everything right.
New baseband is labeled as v20g and old baseband as v10e.
http://xdaforums.com/showthread.php?t=1149530