Although not yet widely available, but the Android 2.2 or Froyo can be sampled at a number of mobile phones. Call it the HTC that has been released for Desire.
In testing this time,we will use HTC Desire to taste the magic Froyo. The way you need to do to switch to Froyo not difficult, here are steps:
1. Check the latest updates
Users can check in advance what updates have been prepared by HTC. To do it just need to go to the Settings menu, then About Phone plainly refers to the System Sotfware Updates. Wait a moment, the phone will check for latest updates.
2. Backup files
Because it will change the operating system, all the installation files, contact lists, and some other files that are on the internal memory will be erased. Thus the backup file must be done. For a list of contacts for example, users can synchronize on a google account.
3. Cleaning SD card
Before the latest update, make sure enough space is available on an external memory used. The reason is, every file you will download will first put on the SD card is available.
4. Prepare a smooth connection
After checking the latest updates available on the HTC server, users will be prompted to download a few files first before switching to Froyo. After that new phones are ready to upgrade the operating system.
In order to smooth the installation process, users are advised to use a smooth connection like Wi-fi. Because the size of the file that will be downloaded which is quite big, about 90MB.
After all donwload process is completed, users are now ready to migrate to Froyo. Wait a few moments, then the phone will perform the installation automatically,hope it's helpull for you...