[1] iPhone OS 3 added a system-wide "cut, copy, and paste" feature, allowing users to more easily move content.

It also introduced Spotlight, a search indexing feature designed to help users locate specific information on their device, such as contacts, email messages or apps.

iPhone OS 3 introduced a "cut, copy, and paste" bubble dialog when users press and hold text.

[6] Users with subscriptions to MobileMe were able to remotely track, lock, and erase their iPhones if lost.

[10][11] iPhone OS 3 was the last major version of iOS for which there was a charge for iPod Touch users to upgrade.