On the Yahoo! BlackBerry Users Group, several users have been debating the memory and other performance factors of the BlackBerry 7750 OS 4.0.

"I have some enterprise business users who have 7750 devices that are currently on the 3.7 device OS," Joe writes. "We are migrating these users to the 4.0 BES and I also want to upgrade their device OS to the 4.0 platform as well."

He asks other Members for a memory comparision between the 4.0 and 3.7 OS.

"Based upon this I may opt to upgrade these users to the 7250 device which has more memory than the 7750 (32mb vs 16mb) and would give them Bluetooth capability," Joe adds. "These users can have hundreds if not thousands of contacts in their address book so memory is very important."

User C. Mark Wagner responded with a mixed, but specific verdict.

"I had no problem upgrading my Verizon BB 7750 to v 4.0," he writes. "The device was noticably slower -- but I did not find it intolerably so."

As to memory, Wagner writes that with just the RIM suite of applications, "free memory seemed to drop from about 2 MB to about 500KB but it worked fine."

The added factor here, at least for Wagner, was the fact that Version 4.0 will let you set up file compression. He writes this capability "helps a lot and allowed me add thrid-party apps and to run with under 100KB."

Still, Wagner finds it necessary to point out that on the BlackBerry 7750, his perception was that OS 4.0 seemed to provoke a memory leak. He solved that problem as well.

But, whenever memory was so low as to cause sluggish behavior," he writes, "a soft reset would free-up quite a bit. I would definitely suggest trying OS 4.0 on the Blackberry 7750) --at least to hold you over until you are ready to upgrade to the BB 7250."