My Omnia 7 Is now 7.5
Microsoft has released the Windows Phone Mango update. It can take a while to get the update. However there is a trick that can let you have the update right away. Follow this article to get Mango now!, it worked in my case. You don’t need to pull the network cable out. You can disable and re-enable the network connection from the Control Panel\Network and Internet\Network Connections