Start by searching... This link BlackBerryOS 4.x Download FAQ - UPGRADE DOWNLOADS
was found in the BlackBerryFAQ link, dead centre top of each page.
Originally Posted by Shundy
I purchased my 7100i at a Nextel Retail Store the day it was released several months ago and the software on it says v18.104.22.168 (Platform 22.214.171.124). Is there something better or a newer version than I have that I should be running on ? If so, how do I access this information to load on to my phone ? Any help would be greatly appreciated. I surfed the forums and didn't come up with anything specifically related to my phone unless I overlooked it.