The link below to the .114 version of this OS has been UPDATED to the current release from T-Mobile US.
Software For BlackBerry® Curve (TM) 8900 smartphone From T-Mobile US; this will load on any carrier's 8900 device.
BlackBerry Handheld Software v126.96.36.199 (Multilanguage)
Package Version: 188.8.131.52
* Applications: 184.108.40.206
* Software Platform: 220.127.116.11
* File name: T-Mobile_BlackBerry_Curve_8900_v18.104.22.168. exe
* File size: 118.17MB
Download OS here: DeviceDownloads
Instructions for installing either version on ANY carrier's 8900:
1. Download the above OS file to the PC then install it to the PC by running (double clicking) the file you downloaded.
2. Go to c:\program files\common files\research in motion\apploader and delete the file named "vendor.xml."
3. Plug in BB and double click on "Loader.exe." It's located in the same place as the above vendor.xml file.
The process takes about 45 minutes to an hour depending on how much data you have to backup and restore during the process. Once it's done loading the new OS it will reboot (it may do this twice during the entire process.) You will see a white screen with an hourglass for up to 20 minutes at a time while the DM says "waiting for initialization."
If, for some reason, you end up with a white screen with small icons and the number 507, simply connect to the PC again and run Loader.exe again and it should load the OS to the device.
For the previous OS for this device, click here: Latest OS: 8900 22.214.171.124/126.96.36.199 (Multilanguage) Thanks Bolin.