Bharti is the name of a carrier in India; it has NOTHING TO DO WITH THE SOFTWARE. That's all written by RIM. The carriers test it and decided when to release it. It doesn't say Bharti anywhere inside.
Go into Options -> About. It should show
v18.104.22.1684 (Platform 22.214.171.124)
That's the version from the Bharti website.
Look in the Ringtones, Themes and Wallpapers forum for threads by Jibi on how to get to the new threads.