The only way you can get Android 2.3 on your HTC Wildfire is from a custom Rom. See the bottom for Instructions.
If you have been waiting for the Official HTC Wildfire 2.3 gingerbread update your going to be disappointed. The device will not be recieving Android 2.3. This news has been around for some time now but the question keeps popping up, so if this is the first time you have herd this sorry for breaking the bad news.
The top end HTC range has recieved this update although the origional Desire is still waiting for its 2.3, as HTC have been struggling to make it fit.
So the HTC Wildfire is not on the list and will not be getting the Android 2.3 in the foreseeable future and may even be ruled out altogether. This was tweeted from Three UK. The Tweet was in response to a query from a follower and stated,
In a way this is no real surprise as the Wildfire is a low-spec device.
Its a shame though if HTC don't upgrade the Wildfire currently running on 2.2, as their owners of this device will miss out on a revamped virtual keyboard and some UI tweaks. However, if you own a Wildfire do not despair, as back in December 2010, HTC shocked everyone when they pushed out an update to the ageing value priced Android phone ‘Magic’ and so, there is still hope.
Instructions (Do this at your own risk)
Install Android 2.3 Gingerbread Cyanogen Mod 7 on your HTC Wildfire. First of all, confirm that you have a rooted HTC Wildfire. If you don't, root it before you proceed further. How to ROOT your Wildfire Guide
Next, download the Android 2.3 Gingerbread Cyanogen Mod 7 ROM for the HTC Wildfire. It's a nightly build so it may have a few bugs. http://mirror.teamdouche.net/?device=buzz&type=nightly
It doesn't have Google Apps installed, so you should also Download Gapps if you want them.
http://goo-inside.me/gapps/gapps-gb-20110115-signed.zip
http://goo-inside.me/gapps/gapps-gb-20110115-signed.zip
Copy both the Android 2.3 ROM and the Gapps files to the root of your SD card.
Search for ROM Manager on the Android Market and install it. Launch ROM Manager and select the Flash Clockwork Mod Recovery option. Install a recovery image and create a backup of your existing ROM if you want.
In ROM Manager, click on the Install ROM from SD Card and select the Android 2.3 Gingerbread Cyanogen Mod 7 ROM you copied to the SD card.
Select both the options - Backup existing ROM and Wipe Data and Cache before installing the ROM. Your phone should reboot into the recovery mode and ROM flashing should be complete.
Once it is done, also flash the Google Apps ZIP (for all the native Google apps found on Android) from ROM Manager. Your HTC Wildfire should now be running Android 2.3 Gingerbread CM7.
Note: Flashing ROMs is a risky procedure. Continue at your own risk. There aren't any known bugs in the Cyanogen Mod 7 Android 2.3 ROM, but you can't be sure until the final ROM is launched. You could wait for the final ROM, but the nightly ROM is quite stable too. If you have any doubts or queries, check out the official XDA thread posted below or leave a reply.