It seems like everyday there are more and more BlackBerry applications that require BlackBerry OS 3.8.  Every time you want to try one of these new apps out it tells you to download the latest OS from your mobile providers website.  For some strange reason the mobile providers do their best to hide BlackBerry OS 4.0 downloads in the least obvious places deep linked within their sites.  Hopefully this list, obtained from BlackBerry Forums will help you out.

If you have BlackBerry OS 3.8, you really don’t need to upgrade.

• NexTel
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.160)
• Telus
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.171)
• Bell Mobility
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.171)
• Sprint
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.171)
• Verizon
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.171)
• AT&T
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.185)
• Cingular
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.185)
• T-Mobile
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.185) (Except for old XX10 series)
• Rogers
  4.0 IS NOW AVAILABLE! – Download Here (Apps 4.0.0.219) (Except for old XX10 series)
• Telstra Australia – Download
• Vodafone UK – Download
• Orange – Download
• Hong Kong CSL – Download
  English, but Supports Chinese Characters.