Hi I bought a new HTC hero last week, but I'm not sure if I need the "ROM version 2.73.405.5 update" available of the HTC website?? My build number is 1.76.405.6 , is that the old one? If so, how do I back all my data? Do I need to take out the memory card before updating? And I also have a contract i.e. pay monthly, so do I need to take out the sim card because on the website it says: "This is a generic software update. Any additional software or settings provided by your mobile operator or company will be lost. If you require this customization, please contact your supplier first before upgrading." Please help!