HTC and T-Mobile are proud to launch a system upgrade for the myTouch 3G Slide. This update will bring the following enhancements to the device.

• Android 2.2.1 FroYo
• Wi-Fi calling
• Wi-Fi hotspot
• USB Tethering (Internet Sharing)
• Low storage (User Data) notification mechanism
• Resolves issues with text and picture messaging
• Resolves some Bluetooth compatibility issues
• Improves compatibility with new Bluetooth devices
• Improves stability and reliability of the device
• Other various minor bug fixes more

http://www.htc.com/us/support/t-mobile-mytouch-3g-slide/downloads/