Google Sync for BlackBerry
Now this has got to be one of the best pieces of software for a BlackBerry that I have found. Like so many people out there I am using BIS (BlackBerry Internet Service) that unfortunately doesn’t sync my contacts or calendar. That is where this software comes in really handy. It will sync both your contacts and calendar, it can be set to automatic or manual sync. I’m currently using automatic and have not noticed any operating speed difference so I thoroughly recommend it. If you don’t have a Gmail account yet don’t worry it’s free to set one up and you can even import your contacts from Outlook (tutorial here).So far so good, now I’m going to assume you have a Gmail account and your contacts are imported already.
1. Point your BlackBerry Browser to http://m.google.com/sync

http://m.google.com/sync
2. Click on Install Now and accept the End user License Agreement

Install Now
3. Once it is installed you will see the options screen. The main selection here is Manual or Automatic Sync. Press back and save.

Press Back to Save
4. Google Sync for BlackBerry will now do it’s thing and all your contacts will be synced with your Gmail. Caution this may cause duplicates if you have items in both places.

Done
Enjoy.