How do I reinstall android OS on My Touch 4G

[melis6777]

I have an HTC My Touch 4G and after trying to install a new app on the phone it locked up. I had to remove the battery, nothing on the phone would work. When I put the battery back in and turned the phone back on it wouldn't do anything, after calling HTC I learned that I need to reinstall the android OS. Does anyone know how to do this? A site or program I can use?

 

[rr26200]

follow my instructions My fix for boot loop/bricked htc mytouch 4g - xda-developers