<p>You may have to wait a few more days perhaps a little longer depending on store supplies until you can get your hands on the latest Apple smartphones. But existing Apple device users can now download and upgrade to the latest major mobile software version.</p><p>Apple opened up its servers for users to download the new software just after 1 pm ET on Wednesday.</p><p>The latest software version is is compatible with iPhone 4 handsets and later, iPad 2 tablets and later, and iPod touch (5th generation) devices. (And don't forget to backup first.)</p><p>iOS 6 and earlier users can upgrade over-the-air (on compatible devices) by navigating to "Software Update" in the "General" section of the device's settings. Past experience suggests while these downloads will be slow as millions of users download the software at the same time. Also, because the size of some of the files are huge, downloading over a Wi-Fi connection is recommended. Due to its size, you may have to delete some content from your device.</p><p><a href="http://www.zdnet.com/apple-releases-ios-7-for-existing-iphone-ipad-upgrades-7000020806/">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.gottabemobile.com/2013/09/19/ios-7-ipad-3-first-impressions-performance/">iOS 7 on iPad 3: First Impressions and Performance</a> (Gotta Be Mobile)</p><p><a href="http://www.telegraph.co.uk/technology/apple/10319852/iOS-7-how-to-install-the-new-software-for-iPhone-and-iPad.html">iOS 7: how to install the new software for iPhone and iPad</a> (Telegraph.co.uk)</p><p><a href="http://www.tuaw.com/2013/09/19/ios-7-on-an-ipad-2-first-impressions/">iOS 7 on an iPad 2: First impressions</a> (tuaw.com)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dw3ErRVdG2IFncM7D2ns_9OFESgBM&ned=us">2,344 additional articles.</a></p>