Apple iOS 2.0
The OS 2.0 also has tons of other improvements and enhancements. Some of the highlighted features are support for Microsoft Exchange ActiveSync to provide over-the-air push email, contact and calendar syncing as well as remote wipe and Cisco IPsec VPN for encrypted access to corporate networks. Other features include real-time mapping, GPS tracking, geotagging, mass move mails, mass delete multiple email messages, search for contacts, access a new scientific calculator, turn on parental control restrictions for specified content, PowerPoint format viewing support, iWork format viewing support, direct screenshot capturing, MobileMe support, save images directly from a web page or email them to and easily transfer them back to your photo library on your Mac or PC.
To apply and upgrade to 2.0 firmware, user are required to download and install iTunes 7.7or newer from Apple.com.
However, unlike previous upgrade where settings and media are maintained, do note that upgrade from version 1.x of to version 2.0 or later, all data will be deleted and erased in order to install the new software, as pointed out in Apple article. However, iTunes will offer to create a one-time media backup of the device depending on what content is on the device and what content is stored in the the device are connected to. User should ensure that enough free space is available on Mac or PC to accommodate a backup that matches the capacity of the iPhone or iPod touch (4 GB, 8 GB, 16 GB, or 32 GB).