How to get windows phone 7 mango update on samsung focus?

Have a samsung focus version 1.3 and I want to know how to update it to mango. I received a message on my phone yesterday saying their was an update but it went away after I clicked it. Help!!|||You will need to plug your phone in to your computer using a USB cable. If you do not already have the Zune software installed you will need to install it. If the software is installed it should start up automatically. If it does not then start up Zune. You should then be prompted to start the upgrade process. If not, go to settings, then phone, then update. The provided source will give you the process in much greater detail.